Fixed bug #153937, making sure the conversion functions return the number

* encoding.c doc/examples/testWriter.c: Fixed bug #153937, making
  sure the conversion functions return the number of byte written.
  Had to fix one of the examples.
Daniel
diff --git a/configure.in b/configure.in
index ed6b94c..53b8a24 100644
--- a/configure.in
+++ b/configure.in
@@ -309,7 +309,7 @@
 	CFLAGS="${CFLAGS} -fexceptions"
     fi
        
-    CFLAGS="${CFLAGS} -pedantic -W -Wunused -Wimplicit -Wreturn-type -Wswitch -Wcomment -Wtrigraphs -Wformat -Wchar-subscripts -Wuninitialized -Wparentheses -Wshadow -Wpointer-arith -Wcast-align -Wwrite-strings -Waggregate-return -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Winline -Wredundant-decls" 
+    CFLAGS="${CFLAGS} -pedantic -W -Wformat -Wunused -Wimplicit -Wreturn-type -Wswitch -Wcomment -Wtrigraphs -Wformat -Wchar-subscripts -Wuninitialized -Wparentheses -Wshadow -Wpointer-arith -Wcast-align -Wwrite-strings -Waggregate-return -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Winline -Wredundant-decls" 
     case "${host}" in
           alpha*-*-linux* )
 	       CFLAGS="${CFLAGS} -mieee"
@@ -447,7 +447,7 @@
 	fi
     fi
     if test "${CC}" = "gcc" ; then
-    CFLAGS="-g -O -pedantic -W -Wunused -Wimplicit -Wreturn-type -Wswitch -Wcomment -Wtrigraphs -Wformat -Wchar-subscripts -Wuninitialized -Wparentheses -Wshadow -Wpointer-arith -Wcast-align -Wwrite-strings -Waggregate-return -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Winline -Wredundant-decls -Wall"
+    CFLAGS="-g -O -pedantic -W -Wformat -Wunused -Wimplicit -Wreturn-type -Wswitch -Wcomment -Wtrigraphs -Wformat -Wchar-subscripts -Wuninitialized -Wparentheses -Wshadow -Wpointer-arith -Wcast-align -Wwrite-strings -Waggregate-return -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Winline -Wredundant-decls -Wall"
     fi
     STATIC_BINARIES="-static"
 dnl -Wcast-qual -ansi