Add index check to getRecipeType() (#4859)

Author: Taskeren

src/main/java/com/gregtechceu/gtceu/api/machine/WorkableTieredMachine.java

@@ -197,7 +197,8 @@ public boolean keepSubscribing() {
     }
 
     public GTRecipeType getRecipeType() {
-        return recipeTypes[activeRecipeType];
+        int index = activeRecipeType >= 0 && activeRecipeType < recipeTypes.length ? activeRecipeType : 0;
+        return recipeTypes[index];
     }
 
     /**

src/main/java/com/gregtechceu/gtceu/api/machine/multiblock/WorkableMultiblockMachine.java

@@ -290,7 +290,8 @@ public void setWorkingEnabled(boolean isWorkingAllowed) {
     }
 
     public GTRecipeType getRecipeType() {
-        return recipeTypes[activeRecipeType];
+        int index = activeRecipeType >= 0 && activeRecipeType < recipeTypes.length ? activeRecipeType : 0;
+        return recipeTypes[index];
     }
 
     /**