WaE: GCC 4.5.1 does not allow #pragma GCC diagnostic warning

sal/rtl/source/alloc_impl.hxx

@@ -260,7 +260,7 @@ typedef CRITICAL_SECTION rtl_memory_lock_type;
 #define GCC_VERSION (__GNUC__ * 10000 \
                      + __GNUC_MINOR__ * 100 \
                      + __GNUC_PATCHLEVEL__)
-#if GCC_VERSION >= 40201 && !defined __clang__
+#if GCC_VERSION >= 40600 && !defined __clang__
 #pragma GCC diagnostic warning "-Wunused-but-set-variable"
 #endif
 #define RTL_VALGRIND_IGNORE_VAL (void)