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xcbgrab: Move NULL check before pointer dereference 

Bug-Id: CID 1254668
This commit is contained in:
Vittorio Giovara 2014-12-17 15:19:41 +01:00
parent 5ac06633cb
commit 9e06327ecb
1 changed files with 5 additions and 1 deletions
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6
libavdevice/xcbgrab.c
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@ -99,12 +99,16 @@ static int xcbgrab_reposition(AVFormatContext *s,
xcb_get_geometry_reply_t *geo)
{
XCBGrabContext *c = s->priv_data;
int x = c->x, y = c->y, p_x = p->win_x, p_y = p->win_y;
int x = c->x, y = c->y;
int w = c->width, h = c->height, f = c->follow_mouse;
int p_x, p_y;
if (!p || !geo)
return AVERROR(EIO);
p_x = p->win_x;
p_y = p->win_y;
if (f == FOLLOW_CENTER) {
x = p_x - w / 2;
y = p_y - h / 2;