progs/xdemos: fix up GLX extension checking

A few of my programs were using the client string in addition to the
main extensions string to see if a feature was present.  Correct this to
only check for the currently available and working extensions.

1 files changed, 3 insertions, 10 deletions

diff --git a/progs/xdemos/msctest.c b/progs/xdemos/msctest.c
index 001ecf04d6..11b0434442 100644
--- a/progs/xdemos/msctest.c
+++ b/progs/xdemos/msctest.c
@@ -45,10 +45,9 @@ void (*wait_sync)(Display *dpy, Window winGL, int64_t target_msc, int64_t diviso
 
 static int GLXExtensionSupported(Display *dpy, const char *extension)
 {
-	const char *extensionsString, *client_extensions, *pos;
+	const char *extensionsString, *pos;
 
 	extensionsString = glXQueryExtensionsString(dpy, DefaultScreen(dpy));
-	client_extensions = glXGetClientString(dpy, GLX_EXTENSIONS);
 
 	pos = strstr(extensionsString, extension);
 
@@ -56,12 +55,6 @@ static int GLXExtensionSupported(Display *dpy, const char *extension)
 	    (pos[strlen(extension)] == ' ' || pos[strlen(extension)] == '\0'))
 		return 1;
 
-	pos = strstr(client_extensions, extension);
-
-	if (pos != NULL && (pos == extensionsString || pos[-1] == ' ') &&
-	    (pos[strlen(extension)] == ' ' || pos[strlen(extension)] == '\0'))
-		return 1;
-
 	return 0;
 }
 
@@ -167,8 +160,8 @@ int main(int argc, char *argv[])
 
 	glXMakeCurrent(disp, winGL, context);
 
-	get_sync_values = glXGetProcAddress((unsigned char *)"glXGetSyncValuesOML");
-	wait_sync = glXGetProcAddress((unsigned char *)"glXWaitForMscOML");
+	get_sync_values = (void *)glXGetProcAddress((unsigned char *)"glXGetSyncValuesOML");
+	wait_sync = (void *)glXGetProcAddress((unsigned char *)"glXWaitForMscOML");
 
 	if (!get_sync_values || !wait_sync) {
 		fprintf(stderr, "failed to get sync values function\n");