fix #1682

git-svn-id: http://svn.osgeo.org/qgis/trunk@10753 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: jef

src/core/raster/qgsrasterlayer.cpp

@@ -712,7 +712,14 @@ const QgsRasterBandStats QgsRasterLayer::bandStatistics( int theBandNo )
     QgsRasterBandStats myNullReturnStats;
     return myNullReturnStats;
   }
+
   // check if we have previously gathered stats for this band...
+  if ( theBandNo < 1 || theBandNo > mRasterStatsList.size() )
+  {
+    // invalid band id, return nothing
+    QgsRasterBandStats myNullReturnStats;
+    return myNullReturnStats;
+  }
 
   QgsRasterBandStats myRasterBandStats = mRasterStatsList[theBandNo - 1];
   myRasterBandStats.bandNumber = theBandNo;