Fix world load time being printed if it wasn't actually set

Author: embeddedt

common/src/main/java/org/embeddedt/modernfix/ModernFixClient.java

@@ -22,7 +22,7 @@
 
 public class ModernFixClient {
     public static ModernFixClient INSTANCE;
-    public static long worldLoadStartTime;
+    public static long worldLoadStartTime = -1;
     private static int numRenderTicks;
 
     public static float gameStartTimeSeconds = -1;