Disable errors by default

This breaks pretty much everybody's build. Thus it's completely
inadequate as a default setting (think of new devs...).

configure.ac

@@ -1026,7 +1026,7 @@ RDC_PROG_CC_WFLAGS([all extra sign-compare undef pointer-arith bad-function-cast
 RDC_PROG_CC_FLAGS([-pipe])
 
 AC_ARG_ENABLE(warnings-as-error,
-      AS_HELP_STRING([--enable-warnings-as-error],[Treat acceptable warnings as error (default in debug)]),, [enable_warnings_as_error="$enable_debug"])
+      AS_HELP_STRING([--enable-warnings-as-error],[Treat acceptable warnings as error (default disabled)]),, [enable_warnings_as_error="no"])
 AS_IF([test "${enable_warnings_as_error}" = "yes"], [
     RDC_PROG_CC_WERRORFLAGS([unused-function unused-label unused-value unused-parameter unused-variable unused \
      missing-braces nonnull parentheses uninitialized address enum-compare undef comment switch \