Fix printf format inconsistencies as pointed out by gcc -Wformat-signedness.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15510 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/configure.ac b/configure.ac
index 340fd20..1a6cfdb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1890,6 +1890,8 @@
 AC_GCC_WARNING_SUBST([write-strings], [FLAG_W_WRITE_STRINGS])
 AC_GCC_WARNING_SUBST([empty-body], [FLAG_W_EMPTY_BODY])
 AC_GCC_WARNING_SUBST([format], [FLAG_W_FORMAT])
+# Disabled for now until all platforms are clean
+# AC_GCC_WARNING_SUBST([format-signedness], [FLAG_W_FORMAT_SIGNEDNESS])
 AC_GCC_WARNING_SUBST([cast-qual], [FLAG_W_CAST_QUAL])
 AC_GCC_WARNING_SUBST([old-style-declaration], [FLAG_W_OLD_STYLE_DECLARATION])
 AC_GCC_WARNING_SUBST([ignored-qualifiers], [FLAG_W_IGNORED_QUALIFIERS])