Make mac compile again.

3rdparty/qocoa/qsearchfield_mac.mm

@@ -162,3 +162,8 @@ void QSearchField::resizeEvent(QResizeEvent *resizeEvent)
 {
     QWidget::resizeEvent(resizeEvent);
 }
+
+bool QSearchField::eventFilter(QObject *o, QEvent *e)
+{
+    return QWidget::eventFilter(o, e);
+}

3rdparty/qocoa/qsearchfield_nonmac.cpp

@@ -167,5 +167,5 @@ bool QSearchField::eventFilter(QObject *o, QEvent *e)
             break;
         }
     }
-    QWidget::eventFilter(o, e);
+    return QWidget::eventFilter(o, e);
 }