Move SpriteFrames.Clear() from R_InitSprites to FTextureManager::Init

- Fixed: Blood sprite rotations were overwritten by the Doom sprite
  rotations.

src/r_data/sprites.cpp

@@ -925,8 +925,6 @@ void R_InitSprites ()
 		numskins++;
 	}
 
-	SpriteFrames.Clear();
-
 	// [RH] Do some preliminary setup
 	if (skins != NULL) delete [] skins;
 	skins = new FPlayerSkin[numskins];

src/textures/texturemanager.cpp

@@ -964,6 +964,7 @@ void FTextureManager::SortTexturesByType(int start, int end)
 void FTextureManager::Init()
 {
 	DeleteAll();
+	SpriteFrames.Clear();
 	// Init Build Tile data if it hasn't been done already
 	if (BuildTileFiles.Size() == 0) CountBuildTiles ();
 	FTexture::InitGrayMap();