Fix several warnings and potentially uninitialized data

ApplicationCode/ModelVisualization/Surfaces/RivSurfaceIntersectionGeometryGenerator.cpp

@@ -182,7 +182,7 @@ void RivSurfaceIntersectionGeometryGenerator::calculateArrays()
         // End loop local memory
 
 #pragma omp for // default scheduling absolutely best
-        for ( int ntVxIdx = 0; ntVxIdx < nativeTriangleIndices.size(); ntVxIdx += 3 )
+        for ( int ntVxIdx = 0; ntVxIdx < static_cast<int>( nativeTriangleIndices.size() ); ntVxIdx += 3 )
         {
             cvf::Vec3d p0 = nativeVertices[nativeTriangleIndices[ntVxIdx + 0]];
             cvf::Vec3d p1 = nativeVertices[nativeTriangleIndices[ntVxIdx + 1]];

ApplicationCode/ModelVisualization/Surfaces/RivSurfacePartMgr.cpp

@@ -456,7 +456,7 @@ void RivSurfacePartMgr::calculateVertexTextureCoordinates( cvf::Vec2fArray*
     cvf::Vec2f* rawPtr = textureCoords->ptr();
 
 #pragma omp parallel for
-    for ( int vxIdx = 0; vxIdx < numVertices; vxIdx++ )
+    for ( int vxIdx = 0; vxIdx < static_cast<int>( numVertices ); vxIdx++ )
     {
         double     cellScalarValue = resultAccessor->cellScalarGlobIdx( vertexToCellIdxMap[vxIdx] );
         cvf::Vec2f texCoord        = mapper->mapToTextureCoord( cellScalarValue );