Do not complain if pmvarrun had no permission to unlink.

--- a/src/pmvarrun.c
+++ b/src/pmvarrun.c
@@ -459,7 +459,7 @@ static int write_count(int fd, long nv, const char *filename) {
 	if (nv <= 0) {
 		if (unlink(filename) >= 0)
 			return true;
-		if (errno != EPERM)
+		if (errno != EPERM && errno != EACCES)
 			l0g("could not unlink %s: %s\n", filename, strerror(errno));
 		/*
 		 * Fallback to just blanking the file. This can happen when
