Stop "Binary patch set is missing" error log in dev environment

src/main/java/net/minecraftforge/fml/common/patcher/ClassPatchManager.java

@@ -33,6 +33,7 @@ import java.util.jar.JarOutputStream;
 import java.util.jar.Pack200;
 import java.util.regex.Pattern;
 
+import net.minecraft.launchwrapper.Launch;
 import net.minecraft.launchwrapper.LaunchClassLoader;
 import net.minecraftforge.fml.common.FMLLog;
 import net.minecraftforge.fml.relauncher.Side;
@@ -171,7 +172,10 @@ public class ClassPatchManager {
             InputStream binpatchesCompressed = getClass().getResourceAsStream("/binpatches.pack.lzma");
             if (binpatchesCompressed==null)
             {
-                FMLLog.log.error("The binary patch set is missing. Either you are in a development environment, or things are not going to work!");
+                if (!((Boolean) Launch.blackboard.get("fml.deobfuscatedEnvironment")))
+                {
+                    FMLLog.log.fatal("The binary patch set is missing, things are not going to work!");
+                }
                 return;
             }
             LzmaInputStream binpatchesDecompressed = new LzmaInputStream(binpatchesCompressed);