long form for consistency

Author: ButchersBoy

MaterialDesignThemes.Wpf/Themes/MaterialDesignTheme.ComboBox.xaml

@@ -6,7 +6,7 @@
 
     <ResourceDictionary.MergedDictionaries>
         <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.Shadows.xaml" />
-        <ResourceDictionary Source="MaterialDesignTheme.ValidationErrorTemplate.xaml" />
+        <ResourceDictionary Source="pack://application:,,,/MaterialDesignThemes.Wpf;component/Themes/MaterialDesignTheme.ValidationErrorTemplate.xaml" />
     </ResourceDictionary.MergedDictionaries>
 
     <converters:TextFieldHintVisibilityConverter x:Key="TextFieldHintVisibilityConverter" IsNotEmptyValue="Collapsed" />