Move mana reducing code back

apps/openmw/mwmechanics/spellcasting.cpp

@@ -889,11 +889,6 @@ namespace MWMechanics
                             MWBase::Environment::get().getWindowManager()->messageBox("#{sMagicSkillFail}");
                         fail = true;
                     }
-
-                    // Reduce mana
-                    MWMechanics::DynamicStat<float> magicka = stats.getMagicka();
-                    magicka.setCurrent(magicka.getCurrent() - spell->mData.mCost);
-                    stats.setMagicka(magicka);
                 }
 
                 if (fail)

apps/openmw/mwworld/worldimp.cpp

@@ -2718,6 +2718,13 @@ namespace MWWorld
                 message = "#{sPowerAlreadyUsed}";
                 fail = true;
             }
+
+            // Reduce mana
+            if (!fail && !godmode)
+            {
+                magicka.setCurrent(magicka.getCurrent() - spell->mData.mCost);
+                stats.setMagicka(magicka);
+            }
         }
 
         if (isPlayer && fail)