From bbb73fe64e32ddaea6d04aeb69cc5cfa9a295806 Mon Sep 17 00:00:00 2001
From: Yuxuan Shui <yshuiv7@gmail.com>
Date: Fri, 12 Oct 2018 23:15:41 +0100
Subject: [PATCH] Fix integer overflow

`x + wid` will convert x to unsigned first, if x < 0, integer overflow
could occur.
---
 src/common.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/common.h b/src/common.h
index b07914f7..7778c743 100644
--- a/src/common.h
+++ b/src/common.h
@@ -1838,10 +1838,10 @@ free_fence(session_t *ps, XSyncFence *pfence) {
  * Check if a rectangle includes the whole screen.
  */
 static inline bool
-rect_is_fullscreen(session_t *ps, int x, int y, unsigned wid, unsigned hei) {
+rect_is_fullscreen(session_t *ps, int x, int y, int wid, int hei) {
   return (x <= 0 && y <= 0 &&
-          (x + wid) >= (unsigned int)ps->root_width &&
-          (y + hei) >= (unsigned int)ps->root_height);
+          (x + wid) >= ps->root_width &&
+          (y + hei) >= ps->root_height);
 }
 
 static void