timetracking: Don't crash when seeing a garbage varbit value

runelite-client/src/main/java/net/runelite/client/plugins/timetracking/farming/FarmingTracker.java

@@ -187,6 +187,11 @@ public class FarmingTracker
 
 		PatchState state = patch.getImplementation().forVarbitValue(value);
 
+		if (state == null)
+		{
+			return null;
+		}
+
 		int stage = state.getStage();
 		int stages = state.getStages();
 		int tickrate = state.getTickRate() * 60;

runelite-client/src/main/java/net/runelite/client/plugins/timetracking/farming/PatchImplementation.java

@@ -24,6 +24,7 @@
  */
 package net.runelite.client.plugins.timetracking.farming;
 
+import javax.annotation.Nullable;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 import net.runelite.client.plugins.timetracking.Tab;
@@ -2576,6 +2577,7 @@ public enum PatchImplementation
 			}
 		};
 
+	@Nullable
 	abstract PatchState forVarbitValue(int value);
 
 	private final Tab tab;