glx: fix open-coded linked list removal function

OMG stab stab stab, YALL.

removal function was made of crack, actually truncated the list from
the one after the find point.

However fixing this makes glean makecurrent fail with a GLX error.

1 files changed, 11 insertions, 5 deletions

diff --git a/glx/glxext.c b/glx/glxext.c
index bdacf8865..520eb2e3f 100644
--- a/glx/glxext.c
+++ b/glx/glxext.c
@@ -150,12 +150,18 @@ void __glXAddToContextList(__GLXcontext *cx)
 
 void __glXRemoveFromContextList(__GLXcontext *cx)
 {
-    __GLXcontext *c, **prev;
+    __GLXcontext *c, *prev;
 
-    prev = &glxAllContexts;
-    for (c = glxAllContexts; c; c = c->next)
-	if (c == cx)
-	    *prev = c->next;
+    if (cx == glxAllContexts)
+	glxAllContexts = cx->next;
+    else {
+	prev = glxAllContexts;
+	for (c = glxAllContexts; c; c = c->next) {
+	    if (c == cx)
+		prev->next = c->next;
+	    prev = c;
+	}
+    }
 }
 
 /*