Merge branch 'jc/genzeros-avoid-raw-write'

A test helper had a single write(2) of 256kB, which was too big for
some platforms (e.g. NonStop), which has been corrected by using
xwrite() wrapper appropriately.

* jc/genzeros-avoid-raw-write:
  test-genzeros: avoid raw write(2)

Author: gitster

t/helper/test-genzeros.c

@@ -17,15 +17,16 @@ int cmd__genzeros(int argc, const char **argv)
 
 	/* Writing out individual NUL bytes is slow... */
 	while (count < 0)
-		if (write(1, zeros, ARRAY_SIZE(zeros)) < 0)
-			return -1;
+		if (xwrite(1, zeros, ARRAY_SIZE(zeros)) < 0)
+			die_errno("write error");
 
 	while (count > 0) {
-		n = write(1, zeros, count < ARRAY_SIZE(zeros) ?
-			  count : ARRAY_SIZE(zeros));
+		n = xwrite(1, zeros,
+			   count < ARRAY_SIZE(zeros)
+			   ? count : ARRAY_SIZE(zeros));
 
 		if (n < 0)
-			return -1;
+			die_errno("write error");
 
 		count -= n;
 	}