Mesa (9.0): dri_util: Use calloc to allocate __DRIcontext

[Ian Romanick]

Module: Mesa
Branch: 9.0
Commit: 5174eed79343346e7e39cf47d1cb18e6caa76c54
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=5174eed79343346e7e39cf47d1cb18e6caa76c54

Author: Ian Romanick <ian.d.romanick at intel.com>
Date:   Wed Sep 26 11:08:11 2012 -0700

dri_util: Use calloc to allocate __DRIcontext

The __DRIcontext contains some pointers, and some drivers check for them to be
NULL in some failure paths.  Instead of sprinkling NULL assignments across the
various drivers, just zero out the whole thing.

NOTE: This is a candidate for the 9.0 branch.

Signed-off-by: Ian Romanick <ian.d.romanick at intel.com>
Reviewed-by: Eric Anholt <eric at anholt.net>
Reviewed-and-tested-by: Kenneth Graunke <kenneth at whitecape.org>
Tested-by: Lu Hua <huax.lu at intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=53618
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=54301
(cherry picked from commit f93cb0bebb10e3e3e5df099be51021b211650356)

---

 src/mesa/drivers/dri/common/dri_util.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index 4276ad9..983bbea 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -272,7 +272,7 @@ dri2CreateContextAttribs(__DRIscreen *screen, int api,
 	return NULL;
     }
 
-    context = malloc(sizeof *context);
+    context = calloc(1, sizeof *context);
     if (!context) {
 	*error = __DRI_CTX_ERROR_NO_MEMORY;
 	return NULL;