Fix wrong loop in Process::wait() method

Nek- · Nek- · commit b038eb2bef4a · 2018-10-30T00:49:23.000+01:00
The while condition was the opposite of the previous while. This was obviously leading to the death of this loop. Loop which was useful according to some people (see #28940), so I just moved the code to the right position.
diff --git a/src/Symfony/Component/Process/Process.php b/src/Symfony/Component/Process/Process.php
@@ -416,11 +416,8 @@ public function wait(callable $callback = null)
             $this->checkTimeout();
             $running = '\\' === \DIRECTORY_SEPARATOR ? $this->isRunning() : $this->processPipes->areOpen();
             $this->readPipes($running, '\\' !== \DIRECTORY_SEPARATOR || !$running);
-        } while ($running);
-
-        while ($this->isRunning()) {
             usleep(1000);
-        }
+        } while ($running);
 
         if ($this->processInformation['signaled'] && $this->processInformation['termsig'] !== $this->latestSignal) {
             throw new ProcessSignaledException($this);
