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git/log: fix log count

saved wrong version when rebasing, oops.

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

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

@@ -14,7 +14,7 @@

 char	*queryexpr;

 char	*commitid;

 int	shortlog;

-int	msgcount;

+int	msgcount = -1;

 Objset	done;

 Objq	objq;

@@ -181,7 +181,7 @@

 	if((n = resolverefs(&h, q)) == -1)

 		sysfatal("resolve: %r");

-	for(i = 0; i < n && msgcount-- > 0; i++){

+	for(i = 0; i < n && (msgcount == -1 || msgcount-- > 0); i++){

 		if((o = readobject(h[i])) == nil)

 			sysfatal("read %H: %r", h[i]);

 		show(o);

@@ -207,7 +207,7 @@

 	qinit(&objq);

 	osinit(&done);

 	qput(&objq, o, 0);

-	while(qpop(&objq, &e) && msgcount-- > 0){

+	while(qpop(&objq, &e) && (msgcount == -1 || msgcount-- > 0)){

 		show(e.o);

 		for(i = 0; i < e.o->commit->nparent; i++){

 			if(oshas(&done, e.o->commit->parent[i]))