fix hanging 'in' command when it is the first command of the protocol and the device is offline

GNUmakefile

@@ -11,12 +11,8 @@ DOCUDIR = docs
 
 PCRE=1
 ASYN=1
-ifdef EPICSVERSION
-ifndef RECORDTYPES
-include src/CONFIG_STREAM
-export RECORDTYPES BUSSES FORMATS
-endif
-endif
+-include ../src/CONFIG_STREAM
+-include src/CONFIG_STREAM
 
 SOURCES += $(RECORDTYPES:%=src/dev%Stream.c)
 SOURCES += $(FORMATS:%=src/%Converter.cc)

src/StreamCore.cc

@@ -919,14 +919,12 @@ evalIn()
             busUnlock();
             flags &= ~BusOwner;
         }
-        busReadRequest(pollPeriod, readTimeout,
+        return busReadRequest(pollPeriod, readTimeout,
             expectedInput, true);
-        return true;
     }
-    busReadRequest(replyTimeout, readTimeout,
+    return busReadRequest(replyTimeout, readTimeout,
         expectedInput, false);
     // continue with readCallback() in another thread
-    return true;
 }
 
 ssize_t StreamCore::