Fix issue where missing command would exit as success.

lib/Cake/Console/Shell.php

@@ -351,7 +351,8 @@ class Shell extends Object {
 			$this->OptionParser = $this->getOptionParser();
 			list($this->params, $this->args) = $this->OptionParser->parse($argv, $command);
 		} catch (ConsoleException $e) {
-			return $this->out($this->OptionParser->help($command));
+			$this->out($this->OptionParser->help($command));
+			return false;
 		}
 
 		$this->command = $command;
@@ -373,7 +374,8 @@ class Shell extends Object {
 		if ($isMain) {
 			return $this->main();
 		}
-		return $this->out($this->OptionParser->help($command));
+		$this->out($this->OptionParser->help($command));
+		return false;
 	}
 
 /**

lib/Cake/Test/Case/Console/Command/ShellTest.php

@@ -747,6 +747,7 @@ class ShellTest extends CakeTestCase {
 
 
 		$result = $Mock->runCommand('idontexist', array());
+		$this->assertFalse($result);
 	}
 
 /**
@@ -777,14 +778,18 @@ class ShellTest extends CakeTestCase {
 	public function testRunCommandHittingTask() {
 		$Shell = $this->getMock('Shell', array('hasTask', 'startup'), array(), '', false);
 		$task = $this->getMock('Shell', array('execute', 'runCommand'), array(), '', false);
-		$task->expects($this->any())->method('runCommand')
+		$task->expects($this->any())
+			->method('runCommand')
 			->with('execute', array('one', 'value'));
 
 		$Shell->expects($this->once())->method('startup');
-		$Shell->expects($this->any())->method('hasTask')->will($this->returnValue(true));
+		$Shell->expects($this->any())
+			->method('hasTask')
+			->will($this->returnValue(true));
+
 		$Shell->RunCommand = $task;
 
-		$Shell->runCommand('run_command', array('run_command', 'one', 'value'));
+		$result = $Shell->runCommand('run_command', array('run_command', 'one', 'value'));
 	}
 
 /**