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glx: Put null check before use

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'dpy' was being checked for null *after* it was already used once.

Also add a null check for psc, and drop gc's redundant initialization.
(cherry picked from commit b5dc40710d)
This commit is contained in:
nobled 2010-08-19 14:06:21 -04:00 • committed by Ian Romanick
parent bba05bc699
commit d7d55ab841
1 changed files with 6 additions and 2 deletions
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8
src/glx/glxcmds.c
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@ -214,12 +214,16 @@ CreateContext(Display * dpy, int generic_id,
Bool allowDirect,
unsigned code, int renderType, int screen)
{
struct glx_context *gc = NULL;
struct glx_screen *const psc = GetGLXScreenConfigs(dpy, screen);
struct glx_context *gc;
struct glx_screen *psc;
struct glx_context *shareList = (struct glx_context *) shareList_user;
if (dpy == NULL)
return NULL;
psc = GetGLXScreenConfigs(dpy, screen);
if (psc == NULL)
return NULL;
if (generic_id == None)
return NULL;