Don't enable SDL_GL_FRAMEBUFFER_SRGB_CAPABLE in Linux when creating the window, to work around a potential bug. sRGB windows are still possible even without that.

src/modules/graphics/opengl/OpenGL.h

@@ -267,6 +267,14 @@ public:
 	 **/
 	void bindTextures(GLuint first, GLsizei count, const GLuint *textures);
 
+	/**
+	 * Helper for binding a texture to a specific texture unit.
+	 *
+	 * @param textureunit Index in the range of [0, maxtextureunits-1]
+	 * @param restoreprev Restore previously bound texture unit when done.
+	 **/
+	void bindTextureToUnit(GLuint texture, int textureunit, bool restoreprev);
+
 	/**
 	 * Helper for deleting an OpenGL texture.
 	 * Cleans up if the texture is currently bound.