Fix some cppcheck reports:

- (error) va_list '<var>' was opened but not closed by va_end()
- (style) Same expression on both sides of '||'
- (style) Same expression on both sides of '!='

src/Mod/Mesh/App/Core/Grid.cpp

@@ -97,7 +97,7 @@ void MeshGrid::InitGrid (void)
 
   // Grid Laengen berechnen wenn nicht initialisiert
   //
-  if ((_ulCtGridsX == 0) || (_ulCtGridsX == 0) || (_ulCtGridsX == 0))
+  if ((_ulCtGridsX == 0) || (_ulCtGridsY == 0) || (_ulCtGridsZ == 0))
     CalculateGridLength(MESH_CT_GRID, MESH_MAX_GRIDS);
 
   // Grid Laengen und Offset bestimmen