Reset traps_count and ptrap when necessary for the next trapezoid cliprect

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=64912
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Reviewed-by: He Junyan <junyan.he@inbox.com>
Reviewed-by: Zhigang Gong <zhigang.gong@linux.intel.com>

glamor/glamor_trapezoid.c

@@ -934,6 +934,9 @@ NTRAPS_LOOP_AGAIN:
 				traps_not_completed -= traps_count;
 				glamor_flush_composite_triangles(screen);
 				goto NTRAPS_LOOP_AGAIN;
+			} else {
+				ptrap = traps;
+				traps_count = ntrap;
 			}
 
 			pbox++;