*Let ghoul regenerate 20 energy per 2 seconds instead of 4 seconds (I think it should be the same as rogue)

--HG--
branch : trunk

src/game/Pet.cpp

@@ -527,21 +527,28 @@ void Pet::Update(uint32 diff)
             }
 
             //regenerate focus for hunter pets or energy for deathknight's ghoul
-            if(m_regenTimer <= diff)
+            if(m_regenTimer)
+            {
+                if(m_regenTimer > diff)
+                    m_regenTimer -= diff;
+                else
                 {
                     switch (getPowerType())
                     {
                         case POWER_FOCUS:
+                            Regenerate(POWER_FOCUS);
+                            m_regenTimer = 4000;
+                            break;
                         case POWER_ENERGY:
-                        Regenerate(getPowerType());
+                            Regenerate(POWER_ENERGY);
+                            m_regenTimer = 2000;
                             break;
                         default:
+                            m_regenTimer = 0;
                             break;
                     }
-                m_regenTimer = 4000;
                 }
-            else
+            }
-                m_regenTimer -= diff;
 
             if(getPetType() != HUNTER_PET)
                 break;