rest of work to convert unwind-protects to ANSI/ISO C; size_t updates; function prototype changes for ANSI/ISO C

tests/assoc.right

@@ -283,7 +283,7 @@ declare -A assoc=(["*"]="star" ["!"]="bang" ["@"]="at" )
 at
 star
 declare -A a=(["@"]="at" )
-./assoc13.sub: line 22: ia[@]: bad array subscript
+./assoc13.sub: line 35: ia[@]: bad array subscript
 declare -a ia
 declare -A a=(["@"]="at2" )
 declare -A a=(["@"]="    string" )

tests/assoc13.sub

@@ -1,3 +1,16 @@
+#   This program is free software: you can redistribute it and/or modify
+#   it under the terms of the GNU General Public License as published by
+#   the Free Software Foundation, either version 3 of the License, or
+#   (at your option) any later version.
+#
+#   This program is distributed in the hope that it will be useful,
+#   but WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#   GNU General Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License
+#   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
 # assignment to @ and *
 
 declare -A assoc
@@ -41,4 +54,3 @@ declare a[*]=star2
 
 declare -p a
 unset a
-