Fix copy and paste errors in l10n.php

lib/l10n.php

@@ -320,7 +320,7 @@ class OC_L10N{
 	 *
 	 * returned function accepts the argument $n
 	 */
-	public function getPluralFormString() {
+	public function getPluralFormFunction() {
 		$this->init();
 		if(is_null($this->plural_form_function)) {
 			$this->plural_form_function = createPluralFormFunction($this->plural_form_string);

lib/l10n/string.php

@@ -23,7 +23,7 @@ class OC_L10N_String{
 		$text = $this->text;
 		if(array_key_exists($this->text, $translations)) {
 			if(is_array($translations[$this->text])) {
-				$id = $l10n->getPluralFormFunction()( $count );
+				$id = $l10n->getPluralFormFunction()($count);
 				$text = $translations[$this->text][$id];
 			}
 			else{