Fix crash with mods calling loadTextureMap in postInit

src/codechicken/microblock/MicroMaterialRegistry.scala

@@ -174,7 +174,8 @@ object MicroMaterialRegistry
     }
 
     private[microblock] def loadIcons() {
-        MicroMaterialRegistry.getIdMap.foreach(e => e._2.loadIcons())
+        if(idMap != null)
+            idMap.foreach(e => e._2.loadIcons())
     }
 
     def getMaxCuttingStrength = maxCuttingStrength

src/codechicken/microblock/handler/MicroblockEventHandler.scala

@@ -19,7 +19,7 @@ object MicroblockEventHandler
     @SideOnly(Side.CLIENT)
     def postTextureStitch(event:TextureStitchEvent.Post)
     {
-        if(event.map.getTextureType == 0 && Loader.instance.hasReachedState(LoaderState.POSTINITIALIZATION))
+        if(event.map.getTextureType == 0)
             MicroMaterialRegistry.loadIcons()
     }