Scope reduction by throwing early.

Change-Id: Ic0b7b69b8c4e57064b31ef62ddceaf6094ca9991

chart2/source/model/main/DataSeries.cxx

@@ -335,8 +335,10 @@ Reference< beans::XPropertySet >
 
     ::std::vector< Reference< chart2::data::XLabeledDataSequence > > aValuesSeries(
         DataSeriesHelper::getAllDataSequencesByRole( aSequences , "values", true ) );
-    if( !aValuesSeries.empty() )
-    {
+
+    if (aValuesSeries.empty())
+        throw lang::IndexOutOfBoundsException();
+
     Reference< chart2::data::XDataSequence > xSeq( aValuesSeries.front()->getValues() );
     if( 0 <= nIndex && nIndex < xSeq->getData().getLength() )
     {
@@ -365,11 +367,6 @@ Reference< beans::XPropertySet >
             ModifyListenerHelper::addListener( xResult, xModifyEventForwarder );
         }
     }
-    }
-    else
-    {
-        throw lang::IndexOutOfBoundsException();
-    }
 
     return xResult;
 }