Use qemu_mallocz.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4711 c046a42c-6fe2-441c-8c8c-71466251a162

exec.c

@@ -721,10 +721,9 @@ static void build_page_bitmap(PageDesc *p)
     int n, tb_start, tb_end;
     TranslationBlock *tb;
 
-    p->code_bitmap = qemu_malloc(TARGET_PAGE_SIZE / 8);
+    p->code_bitmap = qemu_mallocz(TARGET_PAGE_SIZE / 8);
     if (!p->code_bitmap)
         return;
-    memset(p->code_bitmap, 0, TARGET_PAGE_SIZE / 8);
 
     tb = p->first_tb;
     while (tb != NULL) {