Get rid of error suppression

- Thanks to intiilapa (Benoit Durand)
- grep -r "@" library/Zend/ | grep -v "*" | grep -v "// @" used to
  identify suppressions
- Used ErrorHandler to remove suppressions

Author: weierophinney

src/Adapter/Digest.php

@@ -11,6 +11,7 @@
 namespace Zend\Authentication\Adapter;
 
 use Zend\Authentication\Result as AuthenticationResult;
+use Zend\Stdlib\ErrorHandler;
 
 /**
  * @category   Zend
@@ -169,7 +170,10 @@ public function authenticate()
             }
         }
 
-        if (false === ($fileHandle = @fopen($this->filename, 'r'))) {
+        ErrorHandler::start(E_WARNING);
+        $fileHandle = fopen($this->filename, 'r');
+        ErrorHandler::stop();
+        if (false === $fileHandle) {
             throw new Exception\UnexpectedValueException("Cannot open '$this->filename' for reading");
         }
 

src/Adapter/Http/FileResolver.php

@@ -10,6 +10,8 @@
 
 namespace Zend\Authentication\Adapter\Http;
 
+use Zend\Stdlib\ErrorHandler;
+
 /**
  * HTTP Authentication File Resolver
  *
@@ -102,7 +104,9 @@ public function resolve($username, $realm, $password = null)
         }
 
         // Open file, read through looking for matching credentials
-        $fp = @fopen($this->file, 'r');
+        ErrorHandler::start(E_WARNING);
+        $fp = fopen($this->file, 'r');
+        ErrorHandler::stop();
         if (!$fp) {
             throw new Exception\RuntimeException('Unable to open password file: ' . $this->file);
         }