fix compilation with SDL only

src/ui/interface.cpp

@@ -730,6 +730,7 @@ static bool CommandKey(int key)
 			KeyScrollState |= ScrollRight;
 			break;
 
+#if defined(USE_OPENGL) || defined(USE_GLES)
 		case SDLK_SLASH:
 		case SDLK_BACKSLASH:
 			if (KeyModifiers & ModifierAlt) {
@@ -740,7 +741,7 @@ static bool CommandKey(int key)
 				}
 			}
 			break;
-
+#endif
 		default:
 			if (HandleCommandKey(key)) {
 				break;

src/video/graphic.cpp

@@ -1648,6 +1648,7 @@ void CFiller::Load()
 	}
 }
 
+#if defined(USE_OPENGL) || defined(USE_GLES)
 bool CGraphic::DeleteColorCyclingTextures() {
 	if (!ColorCyclingTextures) return false;
 	for (int i = 1; i < NumColorCycles; i++) {
@@ -1662,5 +1663,5 @@ bool CGraphic::DeleteColorCyclingTextures() {
 	ColorCyclingTextures = NULL;
 	return true;
 }
-
+#endif
 //@}

src/video/sdl.cpp

@@ -639,12 +639,14 @@ void InitVideoSdl()
 	if (TheScreen == NULL) {
 		fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
 				Video.Width, Video.Height, Video.Depth, SDL_GetError());
+#if defined(USE_OPENGL) || defined(USE_GLES)
 		if (UseOpenGL) {
 			fprintf(stderr, "Re-trying video without OpenGL\n");
 			UseOpenGL = false;
 			InitVideoSdl();
 			return;
 		}
+#endif
 		if (Video.FullScreen) {
 			fprintf(stderr, "Re-trying video without fullscreen mode\n");
 			Video.FullScreen = false;

src/video/video.cpp

@@ -394,10 +394,12 @@ void AddColorCyclingRange(unsigned int begin, unsigned int end)
 
 void SetColorCycleAll(bool value)
 {
+#if defined(USE_OPENGL) || defined(USE_GLES)
 	if (UseOpenGL) {
 		// FIXME: In OpenGL-mode, we can only cycle the tileset graphic
 		return;
 	}
+#endif
 	CColorCycling::GetInstance().ColorCycleAll = value;
 }