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git/get: correctly skip duplicated refs

oops, continue only breaks the inner loop.

--- a/sys/src/cmd/git/get.c

+++ b/sys/src/cmd/git/get.c

@@ -302,10 +302,10 @@

 	fmtcaps(c, caps, sizeof(caps));

 	for(i = 0; i < nref; i++){

 		if(hasheq(&have[i], &want[i]))

-			continue;

+			goto skip;

 		for(j = 0; j < i; j++)

 			if(hasheq(&want[i], &want[j]))

-				continue;

+				goto skip;

 		if((o = readobject(want[i])) != nil){

 			unref(o);

 			continue;

@@ -314,6 +314,7 @@

 			sysfatal("could not send want for %H", want[i]);

 		caps[0] = 0;

 		req = 1;

+skip:;

 	}

 	flushpkt(c);

-- 

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