talloc returns 0xdeadbeef when asked to allocate 0 bytes

jerry

source/lib/talloc.c

@@ -56,6 +56,14 @@ void *talloc(TALLOC_CTX *t, size_t size)
 {
 	void *p;
 
+	if (size == 0)
+	{
+		/* debugging value used to track down
+		   memory problems */
+		p = (void*)0xdeadbeef;
+	}
+	else
+	{
 		size = (size + (TALLOC_ALIGN-1)) & ~(TALLOC_ALIGN-1);
 
 		if (!t->list || (t->list->total_size - t->list->alloc_size) < size) {
@@ -77,6 +85,8 @@ void *talloc(TALLOC_CTX *t, size_t size)
 
 		p = ((char *)t->list->ptr) + t->list->alloc_size;
 		t->list->alloc_size += size;
+	}
+	
 	return p;
 }