Add helper functions for deling with custom TextureStitched

patches/minecraft/net/minecraft/client/renderer/texture/TextureMap.java.patch

@@ -15,7 +15,7 @@
 +            {
 +                String domain = s.substring(0,s.indexOf(':'));
 +                String file = s.substring(s.indexOf(':')+1);
-+                s1 = "mods/"+domain +"/" + this.field_94254_c + file + this.field_94251_d;
++                s1 = "mods/" + domain +"/" + field_94254_c + file + field_94251_d;
 +            }
 +            List list = TextureManager.func_94267_b().createNewTexture(s, s1);
  
@@ -40,3 +40,41 @@
                  ITexturePack itexturepack = Minecraft.getMinecraft().texturePackList.getSelectedTexturePack();
                  boolean flag1 = !itexturepack.func_98138_b("/" + this.field_94254_c + s2 + ".png", false);
  
+@@ -218,4 +238,37 @@
+     {
+         return this.field_94250_g;
+     }
++
++    //===================================================================================================
++    //                                           Forge Start
++    //===================================================================================================
++    /**
++     * Grabs the registered entry for the specified name, returning null if there was not a entry. 
++     * Opposed to func_94245_a, this will not instantiate the entry, useful to test if a maping exists.
++     * 
++     * @param name The name of the entry to find
++     * @return The registered entry, null if nothing was registered.
++     */
++    public TextureStitched getTextureExtry(String name)
++    {
++        return (TextureStitched)field_94256_j.get(name);
++    }
++
++    /**
++     * Adds a texture registry entry to this map for the specified name if one does not already exist.
++     * Returns false if the map already contains a entry for the specified name. 
++     * 
++     * @param name Entry name
++     * @param entry Entry instance
++     * @return True if the entry was added to the map, false otherwise.
++     */
++    public boolean setTextureEntry(String name, TextureStitched entry)
++    {
++        if (!field_94256_j.containsKey(name))
++        {
++            field_94256_j.put(name, entry);
++            return true;
++        }
++        return false;
++    }
+ }