Fix offset in file_get_contents

Fixes #487

qa-include/Q2A/Plugin/PluginManager.php

@@ -44,7 +44,7 @@ class Q2A_Plugin_PluginManager
 			$metadata = $metadataUtil->fetchFromAddonPath($pluginDirectory);
 			if (empty($metadata)) {
 				// limit plugin parsing to first 8kB
-				$contents = file_get_contents($pluginFile, false, null, -1, 8192);
+				$contents = file_get_contents($pluginFile, false, null, 0, 8192);
 				$metadata = qa_addon_metadata($contents, 'Plugin', true);
 			}
 

qa-include/app/admin.php

@@ -152,7 +152,7 @@ function qa_admin_theme_options()
 		$metadata = $metadataUtil->fetchFromAddonPath($directory);
 		if (empty($metadata)) {
 			// limit theme parsing to first 8kB
-			$contents = file_get_contents($directory . '/qa-styles.css', false, null, -1, 8192);
+			$contents = file_get_contents($directory . '/qa-styles.css', false, null, 0, 8192);
 			$metadata = qa_addon_metadata($contents, 'Theme');
 		}
 		$options[$theme] = isset($metadata['name']) ? $metadata['name'] : $theme;

qa-include/pages/admin/admin-default.php

@@ -1038,7 +1038,7 @@ foreach ($showoptions as $optionname) {
 				$metadata = $metadataUtil->fetchFromAddonPath($themedirectory);
 				if (empty($metadata)) {
 					// limit theme parsing to first 8kB
-					$contents = file_get_contents($themedirectory . '/qa-styles.css', false, null, -1, 8192);
+					$contents = file_get_contents($themedirectory . '/qa-styles.css', false, null, 0, 8192);
 					$metadata = qa_addon_metadata($contents, 'Theme');
 				}
 

qa-include/pages/admin/admin-plugins.php

@@ -127,7 +127,7 @@ if (!empty($fileSystemPlugins)) {
 			$pluginFile = $pluginDirectoryPath . '/qa-plugin.php';
 
 			// limit plugin parsing to first 8kB
-			$contents = file_get_contents($pluginFile, false, null, -1, 8192);
+			$contents = file_get_contents($pluginFile, false, null, 0, 8192);
 			$metadata = qa_addon_metadata($contents, 'Plugin');
 		}