[Process] fixed setting the timeout to null

src/Symfony/Component/Process/Process.php

@@ -595,7 +595,9 @@ class Process
     public function setTimeout($timeout)
     {
         if (null === $timeout) {
-            return null;
+            $this->timeout = null;
+
+            return;
         }
 
         $timeout = (integer) $timeout;

src/Symfony/Component/Process/ProcessBuilder.php

@@ -91,7 +91,9 @@ class ProcessBuilder
     public function setTimeout($timeout)
     {
         if (null === $timeout) {
-            return null;
+            $this->timeout = null;
+
+            return;
         }
 
         $timeout = (integer) $timeout;

src/Symfony/Component/Process/Tests/ProcessBuilderTest.php

@@ -92,4 +92,17 @@ class ProcessBuilderTest extends \PHPUnit_Framework_TestCase
         $pb = new ProcessBuilder();
         $pb->setTimeout(-1);
     }
+
+    public function testNullTimeout()
+    {
+        $pb = new ProcessBuilder();
+        $pb->setTimeout(10);
+        $pb->setTimeout(null);
+
+        $r = new \ReflectionObject($pb);
+        $p = $r->getProperty('timeout');
+        $p->setAccessible(true);
+
+        $this->assertNull($p->getValue($pb));
+    }
 }

src/Symfony/Component/Process/Tests/ProcessTest.php

@@ -35,6 +35,15 @@ class ProcessTest extends \PHPUnit_Framework_TestCase
         $p->setTimeout(-1);
     }
 
+    public function testNullTimeout()
+    {
+        $p = new Process('');
+        $p->setTimeout(10);
+        $p->setTimeout(null);
+
+        $this->assertNull($p->getTimeout());
+    }
+
     /**
      * tests results from sub processes
      *