fix mod_basic clang build warning, we don't need to declare var we don't use on…

fix mod_basic clang build warning, we don't need to declare var we don't use on this side of the ifdef

src/mod/languages/mod_basic/my_basic.c

@@ -565,7 +565,7 @@ static void _ht_destroy(_ht_node_t* ht);
 #ifdef _MB_ENABLE_ALLOC_STAT
 static volatile size_t _mb_allocated = 0;
 #else /* _MB_ENABLE_ALLOC_STAT */
-static volatile size_t _mb_allocated = (size_t)(~0);
+	//static volatile size_t _mb_allocated = (size_t)(~0);
 #endif /* _MB_ENABLE_ALLOC_STAT */
 
 static void* mb_malloc(size_t s);