Add fix for O_NONBLOCK file-descriptor as output pipe

If the output of an fd is a pipe with O_NONBLOCK set, the script will die as
soon as the pipe fills up due to the write call returning with EAGAIN. This
fixes that.

Signed-off-by: Tyrolyean <tyrolyean@tyrolyean.net>

shadermeh.c

@@ -51,7 +51,7 @@ static int write_retry(int fd, const void *buffer, size_t size)
 		int ret = write(fd, buffer, size);
 
 		if (ret < 0) {
-			if (errno == EINTR)
+			if (errno == EINTR || errno == EAGAIN)
 				continue;
 			perror("write");
 			return -1;