Tweak to r6898. It seems that some GEOS versions use 'int' and others…

… 'unsigned int'

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@6907 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/core/qgsgeometry.cpp

@@ -1978,7 +1978,7 @@ double QgsGeometry::closestVertexWithContext(const QgsPoint& point,
   GEOS_GEOM::CoordinateSequence* sequence = mGeos->getCoordinates();
   if(sequence)
   {
-    for(unsigned int i = 0; i < sequence->getSize(); ++i)
+    for(int i = 0; i < (int) sequence->getSize(); ++i)
     {
       double testDist = point.sqrDist(sequence->getAt(i).x, sequence->getAt(i).y);
       if(testDist < sqrDist)
@@ -3231,7 +3231,7 @@ bool QgsGeometry::exportGeosToWkb()
             geometrySize += sizeof(int);
             geometrySize += theRing->getNumPoints()*2*sizeof(double);
           }
-          for(unsigned int i = 0; i < thePolygon->getNumInteriorRing(); ++i)
+          for(int i = 0; i < (int) thePolygon->getNumInteriorRing(); ++i)
           {
             geometrySize += sizeof(int); //number of points in ring
             theRing = thePolygon->getInteriorRingN(i);
@@ -3265,7 +3265,7 @@ bool QgsGeometry::exportGeosToWkb()
             position += sizeof(int);
             const GEOS_GEOM::CoordinateSequence* ringSequence = theRing->getCoordinatesRO();
             //for(int j = 0; j < nPointsInRing; ++j)
-            for(unsigned int j = 0; j <ringSequence->getSize(); ++j)
+            for(int j = 0; j < (int) ringSequence->getSize(); ++j)
             {
               //x = theRing->getPointN(j)->getX();
               x = ringSequence->getAt(j).x;
@@ -3279,7 +3279,7 @@ bool QgsGeometry::exportGeosToWkb()
           }
 
           //interior rings after
-          for(unsigned int i = 0; i < thePolygon->getNumInteriorRing(); ++i)
+          for(int i = 0; i < (int) thePolygon->getNumInteriorRing(); ++i)
           {
             theRing = thePolygon->getInteriorRingN(i);
             if(theRing)