added qemu_mallocz()

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@660 c046a42c-6fe2-441c-8c8c-71466251a162

osdep.c

@@ -281,6 +281,16 @@ void *qemu_malloc(size_t size)
 
 #endif
 
+void *qemu_mallocz(size_t size)
+{
+    void *ptr;
+    ptr = qemu_malloc(size);
+    if (!ptr)
+        return NULL;
+    memset(ptr, 0, size);
+    return ptr;
+}
+
 /****************************************************************/
 /* printf support */