tdf#124385: toolkit: do not fail if ResourceListener is not defined

If current control (for example TabPageContainer) is missing
resource listener property we should not fail script with
exception. Just behave as with empty ResourceListener.

Change-Id: I260feec775a5d197bebc9414b652dd6f89e35035
Reviewed-on: https://gerrit.libreoffice.org/69740
Tested-by: Jenkins
Reviewed-by: Thorsten Behrens <Thorsten.Behrens@CIB.de>

toolkit/source/controls/controlmodelcontainerbase.cxx

@@ -1741,6 +1741,9 @@ void ControlContainerBase::ImplStartListingForResourceEvents()
 {
     Reference< resource::XStringResourceResolver > xStringResourceResolver;
 
+    if ( !ImplHasProperty(PROPERTY_RESOURCERESOLVER) )
+        return;
+
     ImplGetPropertyValue( PROPERTY_RESOURCERESOLVER ) >>= xStringResourceResolver;
 
     // Add our helper as listener to retrieve notifications about changes
@@ -1757,7 +1760,11 @@ void ControlContainerBase::ImplUpdateResourceResolver()
 {
     Reference< resource::XStringResourceResolver > xStringResourceResolver;
 
-    ImplGetPropertyValue( PROPERTY_RESOURCERESOLVER ) >>= xStringResourceResolver;
+    if ( !ImplHasProperty(PROPERTY_RESOURCERESOLVER) )
+        return;
+
+    ImplGetPropertyValue(PROPERTY_RESOURCERESOLVER) >>= xStringResourceResolver;
+
     if ( !xStringResourceResolver.is() )
         return;