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sam: fix memory leak for name in fwrite

--- a/sys/src/cmd/sam/io.c

+++ b/sys/src/cmd/sam/io.c

@@ -41,6 +41,7 @@

 		f->qidpath = qid;

 		f->mtime = mtime;

 		warn_S(Wdate, &genstr);

+		free(name);

 		return;

 	}

 	if(genc)

@@ -49,8 +50,10 @@

 	if((io=create(genc, 1, 0666L)) < 0)

 		error_r(Ecreate, genc);

 	dprint("%s: ", genc);

-	if(statfd(io, 0, 0, 0, &length, &appendonly) > 0 && appendonly && length>0)

+	if(statfd(io, 0, 0, 0, &length, &appendonly) > 0 && appendonly && length>0){

+		free(name);

 		error(Eappend);

+	}

 	n = writeio(f);

 	if(f->name.s[0]==0 || samename){

 		if(addr.r.p1==0 && addr.r.p2==f->nc)

@@ -70,6 +73,7 @@

 			checkqid(f);

 		}

 	}

+	free(name);

 }

 Posn