long if/else block to switch statement

Model/Datasource/ImapSource.php

@@ -1190,21 +1190,20 @@ class ImapSource extends DataSource {
 	 * 2011-09-02 ms
 	 */
 	protected function _decodeString($message, $coding) {
-		if ($coding == 0) {
-			$message = imap_8bit($message);
-		} elseif ($coding == 1) {
-			$message = imap_8bit($message);
-		} elseif ($coding == 2) {
-			$message = imap_binary($message);
-		} elseif ($coding == 3) {
-			$message = imap_base64($message);
-		} elseif ($coding == 4) {
-			$message = imap_qprint($message);
-		} elseif ($coding == 5) {
-			// plain
-			//$message = imap_base64($message);
-		}
-		return $message;
+		switch ($coding) {
+			case 0:
+			case 1:
+				return imap_8bit($message);
+			case 2:
+				return imap_binary($message);
+			case 3:
+				return imap_base64($message);
+			case 4:
+				return imap_qprint($message);
+			default:
+				// plain
+				return $message;
+		}
 	}
 
 	/**