fix config crash when accessing isOpaqueCube() before postInit

src/main/kotlin/mods/betterfoliage/BetterFoliageMod.kt

@@ -29,6 +29,7 @@ object BetterFoliageMod {
 
     lateinit var log: Logger
     var config: Configuration? = null
+    var isAfterPostInit = false
 
     @JvmStatic
     @Mod.InstanceFactory
@@ -47,6 +48,7 @@ object BetterFoliageMod {
         if (FMLCommonHandler.instance().effectiveSide == Side.CLIENT) {
             Config.attach(config!!)
             Client.log(INFO, "BetterFoliage initialized")
+            isAfterPostInit = true
         }
     }
 

src/main/kotlin/mods/betterfoliage/client/Hooks.kt

@@ -32,8 +32,8 @@ fun doesSideBlockRenderingOverride(original: Boolean, blockAccess: IBlockAccess,
 }
 
 fun isOpaqueCubeOverride(original: Boolean, state: IBlockState): Boolean {
-    // caution: blocks are initialized and the method called before any mods are loaded
-    if (BetterFoliageMod.config == null) return original
+    // caution: blocks are initialized and the method called during startup
+    if (!BetterFoliageMod.isAfterPostInit) return original
     return original && !(Config.enabled && Config.roundLogs.enabled && Config.blocks.logs.matchesID(state.block))
 }