minor #28965 [Process] pass all output to the wait-until callback (ni…

…colas-grekas)

This PR was merged into the 4.2-dev branch.

Discussion
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[Process] pass all output to the wait-until callback

| Q             | A
| ------------- | ---
| Branch?       | 4.2
| Bug fix?      | yes
| New feature?  |
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Introduced yesterday, my bad.
Should make appveyor green hopefully.

Commits
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a320133 [Process] pass all output to the wait-until callback

src/Symfony/Component/Process/Process.php

@@ -458,7 +458,7 @@ public function waitUntil(callable $callback): bool
 
             foreach ($output as $type => $data) {
                 if (3 !== $type) {
-                    $ready = $ready || $callback(self::STDOUT === $type ? self::OUT : self::ERR, $data);
+                    $ready = $callback(self::STDOUT === $type ? self::OUT : self::ERR, $data) || $ready;
                 } elseif (!isset($this->fallbackStatus['signaled'])) {
                     $this->fallbackStatus['exitcode'] = (int) $data;
                 }