Verifying that a pointer value is not NULL is not required.

http://www.viva64.com/en/d/0278/print/

GeoLib/Raster.cpp

@@ -50,8 +50,7 @@ void Raster::refineRaster(std::size_t scaling)
 
 Raster::~Raster()
 {
-	if (_raster_data != NULL)
-		delete [] _raster_data;
+	delete [] _raster_data;
 }
 
 void Raster::setCellSize(double cell_size)

MathLib/LinAlg/Sparse/CRSMatrixDiagPrecond.h

@@ -51,8 +51,7 @@ public:
 
 	void calcPrecond()
 	{
-		if (_inv_diag != NULL)
-			delete [] _inv_diag;
+		delete [] _inv_diag;
 		_inv_diag = new double[_n_rows];
 
 		if (!generateDiagPrecond(_n_rows, _row_ptr, _col_idx, _data, _inv_diag)) {