input: free the EQ allocated memory on shutdown (#38634)

mieqFini() already does the right thing, but it needs to be called by the
various DDXs and the XTest Extension.

X.Org Bug 38634 <http://bugs.freedesktop.org/show_bug.cgi?id=38634>

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Acked-by: Jeremy Huddleston <jeremyhu@apple.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

Xext/xtest.c

@@ -679,12 +679,19 @@ GetXTestDevice(DeviceIntPtr master)
     return NULL;
 }
 
+static void
+XTestExtensionTearDown(ExtensionEntry *e)
+{
+    FreeEventList(xtest_evlist, GetMaximumEventsNum());
+    xtest_evlist = NULL;
+}
+
 void
 XTestExtensionInit(INITARGS)
 {
     AddExtension(XTestExtensionName, 0, 0,
             ProcXTestDispatch, SProcXTestDispatch,
-            NULL, StandardMinorOpcode);
+            XTestExtensionTearDown, StandardMinorOpcode);
 
     xtest_evlist = InitEventList(GetMaximumEventsNum());
 }