rt: recreate sprite model on every map

This is a workaround for inconsistent memory management: some subsystems completely clear their memories and start allocating from zero. This leads to overwriting long lived sprite model with garbage.

TODO FIXME

ref/vk/vk_scene.c

@@ -127,6 +127,8 @@ static void loadBrushModels( void ) {
 static void loadMap(const model_t* const map) {
 	mapLoadBegin(map);
 
+	R_SpriteNewMapFIXME();
+
 	// Load light entities and patch data prior to loading map brush model
 	XVK_ParseMapEntities();
 

ref/vk/vk_sprite.c

@@ -113,18 +113,31 @@ static qboolean createQuadModel(void) {
 		});
 }
 
-qboolean R_SpriteInit(void) {
-	R_SpeedsRegisterMetric(&g_sprite.stats.sprites, "sprites_count", kSpeedsMetricCount);
-
-	return createQuadModel();
-}
-
-void R_SpriteShutdown(void) {
+static void destroyQuadModel(void) {
 	if (g_sprite.quad.model.num_geometries)
 		VK_RenderModelDestroy(&g_sprite.quad.model);
 
 	if (g_sprite.quad.geom.block_handle.size)
 		R_GeometryRangeFree(&g_sprite.quad.geom);
+
+	g_sprite.quad.model.num_geometries = 0;
+	g_sprite.quad.geom.block_handle.size = 0;
+}
+
+qboolean R_SpriteInit(void) {
+	R_SpeedsRegisterMetric(&g_sprite.stats.sprites, "sprites_count", kSpeedsMetricCount);
+
+	return true;
+	//return createQuadModel();
+}
+
+void R_SpriteShutdown(void) {
+	destroyQuadModel();
+}
+
+void R_SpriteNewMapFIXME(void) {
+	destroyQuadModel();
+	ASSERT(createQuadModel());
 }
 
 static mspriteframe_t *R_GetSpriteFrame( const model_t *pModel, int frame, float yaw )

ref/vk/vk_sprite.h

@@ -11,3 +11,6 @@ void R_VkSpriteDrawModel( cl_entity_t *e, float blend );
 
 qboolean R_SpriteInit(void);
 void R_SpriteShutdown(void);
+
+// FIXME needed to recreate the sprite quad model, otherwise its memory will be freed, reused and corrupted
+void R_SpriteNewMapFIXME(void);