Add missing checks into render directory.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/render/sdl2graphics.cpp b/src/render/sdl2graphics.cpp
index c9f661d30..3b631caa5 100644
--- a/src/render/sdl2graphics.cpp
+++ b/src/render/sdl2graphics.cpp
@@ -542,6 +542,8 @@ void SDLGraphics::calcTileCollection(ImageCollection *const vertCol,
                                      const Image *const image,
                                      int x, int y)
 {
+    if (!vertCol)
+        return;
     if (vertCol->currentImage != image)
     {
         ImageVertexes *const vert = new ImageVertexes();
@@ -560,6 +562,8 @@ void SDLGraphics::calcTileCollection(ImageCollection *const vertCol,
 void SDLGraphics::drawTileCollection(const ImageCollection
                                      *const vertCol)
 {
+    if (!vertCol)
+        return;
     const ImageVertexesVector &draws = vertCol->draws;
     const ImageCollectionCIter it_end = draws.end();
     for (ImageCollectionCIter it = draws.begin(); it != it_end; ++ it)
@@ -580,6 +584,8 @@ void SDLGraphics::drawTileCollection(const ImageCollection
 
 void SDLGraphics::drawTileVertexes(const ImageVertexes *const vert)
 {
+    if (!vert)
+        return;
     // vert and img must be != 0
     const Image *const img = vert->image;
     const DoubleRects *const rects = &vert->sdl;