Fixed production modifiers to be additive

src/main/java/magicbees/tileentity/TileEntityMagicApiary.java

@@ -658,9 +658,9 @@ public class TileEntityMagicApiary extends TileEntity implements ISidedInventory
 
         @Override
         public float getProductionModifier(IBeeGenome genome, float currentModifier) {
-            float mod = 0.9f;
+            float mod = -0.1f;// was 0.9x, now -0.1
             if (magicApiary.isProductionBoosted()) {
-                mod = mod * 2f;
+                mod = 1.8f;// was 1.8x, now "remains" as +1.8
             }
             return mod;
         }