build: Use -Werror only for the check.

* configure.ac: Do not add -Werror to mycflags.
--

On Windows and possible also on other platforms we expect to a get a
few errors or warnins.  Thus we can't use -Werror by default.  This is
why we have a separate configure options --enable-werror ;-).

Fixes-commit: 3ecd1a41be
Signed-off-by: Werner Koch <wk@gnupg.org>

configure.ac

@@ -1617,7 +1617,7 @@ if test "$GCC" = yes; then
         AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],_gcc_wopt=yes,_gcc_wopt=no)
         AC_MSG_RESULT($_gcc_wopt)
         if test x"$_gcc_wopt" = xyes ; then
-          mycflags="$mycflags -Wlogical-op -Werror"
+          mycflags="$mycflags -Wlogical-op"
         fi
 
         AC_MSG_CHECKING([if gcc supports -Wvla])