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ip/gping: set display->locking before starting mouseproc (race)

--- a/sys/src/cmd/ip/gping.c

+++ b/sys/src/cmd/ip/gping.c

@@ -1018,10 +1018,10 @@

 		fprint(2, "%s: initdraw failed: %r\n", argv0);

 		exits("initdraw");

 	}

+	display->locking = 1;	/* tell library we're using the display lock */

 	colinit();

 	einit(Emouse);

 	startproc(mouseproc, 0);

-	display->locking = 1;	/* tell library we're using the display lock */

 	resize();