Check for malloc failure in _xgeGetExtensionVersion

Handles gcc warning:
Xge.c: In function ‘_xgeGetExtensionVersion’:
Xge.c:196:25: warning: dereference of possibly-NULL ‘vers’ [CWE-690]
  [-Wanalyzer-possible-null-dereference]

Fixes: 850263a ("Add GenericEvent extension (XGE).")
Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/Xge.c b/src/Xge.c
index 5a19408..4c4297f 100644
--- a/src/Xge.c
+++ b/src/Xge.c
@@ -192,8 +192,10 @@ _xgeGetExtensionVersion(Display* dpy,
     }
 
     vers = Xmalloc(sizeof(XGEVersionRec));
-    vers->major_version = rep.majorVersion;
-    vers->minor_version = rep.minorVersion;
+    if (vers != NULL) {
+        vers->major_version = rep.majorVersion;
+        vers->minor_version = rep.minorVersion;
+    }
     return vers;
 }