fix problem in PVField::replaceStructure.

There is still a memory leak

test/testLinkedListAux

@@ -1,20 +1,20 @@
 
 Time test
-diff 23.623024 milliSeconds
-time per iteration 23.623024 microseconds
-time per addTail/removeHead 0.011812 microseconds
+diff 23.288030 milliSeconds
+time per iteration 23.288030 microseconds
+time per addTail/removeHead 0.011644 microseconds
 
 Time test locked
-diff 178.929120 milliSeconds
-time per iteration 178.929120 microseconds
-time per addTail/removeHead 0.089465 microseconds
+diff 175.968013 milliSeconds
+time per iteration 175.968013 microseconds
+time per addTail/removeHead 0.087984 microseconds
 
 Time std::list test
-diff 632.698846 milliSeconds
-time per iteration 632.698846 microseconds
-time per addTail/removeHead 0.316349 microseconds
+diff 631.892603 milliSeconds
+time per iteration 631.892603 microseconds
+time per addTail/removeHead 0.315946 microseconds
 
 Time std::list test locked
-diff 788.837800 milliSeconds
-time per iteration 788.837800 microseconds
-time per addTail/removeHead 0.394419 microseconds
+diff 791.255075 milliSeconds
+time per iteration 791.255075 microseconds
+time per addTail/removeHead 0.395628 microseconds

test/testPVAppend

@@ -0,0 +1,14 @@
+structure request
+    string fieldList value,timeStamp
+structure request
+    string fieldList value,timeStamp
+    string extra junk
+structure parent
+    structure child1
+        string value bla
+    structure child2
+        string value bla
+field:  totalConstruct 107 totalDestruct 101 ACTIVE 6
+pvField:  totalConstruct 8 totalDestruct 8
+linkedListNode:  totalConstruct 5 totalDestruct 5
+linkedList:  totalConstruct 1 totalDestruct 1

test/testPVAppend.pl

@@ -0,0 +1,12 @@
+eval 'exec perl -S $0 ${1+"$@"}'  # -*- Mode: perl -*-
+    if $running_under_some_shell; # testPVAppend.pl
+use Env;
+system ("rm testPVAppend");
+system ("rm testPVAppendDiff");
+system ("../bin/${EPICS_HOST_ARCH}/testPVAppend testPVAppend");
+system ("diff testPVAppend testPVAppendGold >> testPVAppendDiff");
+if(-z "testPVAppendDiff") {
+    print "testPVAppend OK\n";
+} else {
+    print "testPVAppend Failed\n";
+}

test/testPVAppendGold

@@ -0,0 +1,14 @@
+structure request
+    string fieldList value,timeStamp
+structure request
+    string fieldList value,timeStamp
+    string extra junk
+structure parent
+    structure child1
+        string value bla
+    structure child2
+        string value bla
+field:  totalConstruct 107 totalDestruct 101 ACTIVE 6
+pvField:  totalConstruct 8 totalDestruct 8
+linkedListNode:  totalConstruct 5 totalDestruct 5
+linkedList:  totalConstruct 1 totalDestruct 1

test/testPVData

@@ -283,7 +283,7 @@ structure string
     timeStamp timeStamp
         long secondsPastEpoch 0
         int nanoSeconds 0
-field:  totalConstruct 136 totalDestruct 136
+field:  totalConstruct 136 totalDestruct 135 ACTIVE 1
 pvField:  totalConstruct 281 totalDestruct 281
 linkedListNode:  totalConstruct 5 totalDestruct 5
 linkedList:  totalConstruct 1 totalDestruct 1

test/testPVDataDiff

@@ -0,0 +1,4 @@
+286c286
+< field:  totalConstruct 136 totalDestruct 135 ACTIVE 1
+---
+> field:  totalConstruct 136 totalDestruct 136

test/testThreadAux

@@ -1 +1 @@
-time per call 37.293004 microseconds
+time per call 40.057018 microseconds

test/testTimeStampAux

@@ -1,5 +1,5 @@
-current 1294842528 236065826 milliSec 1294842528236
-2011.01.12 09:28:48 236065826 nanoSeconds isDst false
+current 1295462802 840097682 milliSec 1295462802840
+2011.01.19 13:46:42 840097682 nanoSeconds isDst false
 fromTime_t
-current 1294842528 0 milliSec 1294842528000
-2011.01.12 09:28:48 0 nanoSeconds isDst false
+current 1295462802 0 milliSec 1295462802000
+2011.01.19 13:46:42 0 nanoSeconds isDst false

test/testTimerAux

@@ -1,6 +1,6 @@
-one requested 0.400000  diff 0.400196 seconds
-two requested 0.200000  diff 0.200182 seconds
-one requested 0.200000  diff 0.200248 seconds
-two requested 0.400000  diff 0.400307 seconds
-one requested 0.000000  diff 0.000033 seconds
-two requested 0.000000  diff 0.000049 seconds
+one requested 0.400000  diff 0.400263 seconds
+two requested 0.200000  diff 0.200168 seconds
+one requested 0.200000  diff 0.200136 seconds
+two requested 0.400000  diff 0.400176 seconds
+one requested 0.000000  diff 0.000011 seconds
+two requested 0.000000  diff 0.000018 seconds