Only use mb_strpos if multibyte support is requested

Author: slusarz

lib/Sabberworm/CSS/Parser.php

@@ -540,7 +540,7 @@ private function consumeUntil($aEnd, $bIncludeEnd = false) {
 		$aEnd = is_array($aEnd) ? $aEnd : array($aEnd);
 		$iEndPos = null;
 		foreach ($aEnd as $sEnd) {
-			$iCurrentEndPos = mb_strpos($this->sText, $sEnd, $this->iCurrentPosition, $this->sCharset);
+			$iCurrentEndPos = $this->strpos($this->sText, $sEnd, $this->iCurrentPosition, $this->sCharset);
 			if($iCurrentEndPos === false) {
 				continue;
 			}
@@ -574,4 +574,12 @@ private function strlen($text) {
 		}
 	}
 
+	private function strpos($text, $needle, $offset, $charset) {
+		if ($this->oParserSettings->bMultibyteSupport) {
+			return mb_strpos($text, $needle, $offset, $charset);
+		} else {
+			return strpos($text, $needle, $offset);
+		}
+	}
+
 }