Resolves: tdf#120370 should check gradientgrid sensitivity

rather than whether listbox first entry is not selected

Change-Id: Ic3dc574f6f1a476929e89e695849756437024cee
Reviewed-on: https://gerrit.libreoffice.org/61559Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

cui/source/tabpages/tptrans.cxx

@@ -292,7 +292,7 @@ bool SvxTransparenceTabPage::FillItemSet(SfxItemSet* rAttrs)
             }
         }
     }
-    else if (m_xLbTrgrGradientType->get_active())
+    else if (m_xGridGradient->get_sensitive())
     {
         // transparence gradient, fill ItemSet from values
         if (!bGradActive