Remove useless checks for NULL before freeing

This patch has been generated by the following Coccinelle semantic
patch:

// Remove useless checks for NULL before freeing
//
// free (NULL) is a no-op, so there is no need to avoid it

@@
expression E;
@@
+ free (E);
+ E = NULL;
- if (unlikely (E != NULL)) {
-   free(E);
(
-   E = NULL;
|
-   E = 0;
)
   ...
- }

@@
expression E;
type T;
@@
+ free ((T) E);
+ E = NULL;
- if (unlikely (E != NULL)) {
-   free((T) E);
(
-   E = NULL;
|
-   E = 0;
)
   ...
- }

@@
expression E;
@@
+ free (E);
- if (unlikely (E != NULL)) {
-   free (E);
- }

@@
expression E;
type T;
@@
+ free ((T) E);
- if (unlikely (E != NULL)) {
-   free ((T) E);
- }

Reviewed-by: Brian Paul <[email protected]>

1 files changed, 2 insertions, 4 deletions

diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index 7978bfd4633..5644f665c4c 100644
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -126,8 +126,7 @@ dri2_destroy_context(struct glx_context *context)
 
    driReleaseDrawables(&pcp->base);
 
-   if (context->extensions)
-      free((char *) context->extensions);
+   free((char *) context->extensions);
 
    (*psc->core->destroyContext) (pcp->driContext);
 
@@ -313,8 +312,7 @@ dri2_create_context_attribs(struct glx_screen *base,
    return &pcp->base;
 
 error_exit:
-   if (pcp != NULL)
-      free(pcp);
+   free(pcp);
 
    return NULL;
 }