CORE/Spell: add diminishing returns on reflected spell. (#1050)

Fix "Spell which is reflected doesn't create DR on whom is casting the spell"
Now warrior would not add diminishing returns if he reflect spell (code may be a bit hacky)

Closes issue #650 on github

src/server/game/Spells/Spell.h

@@ -61,6 +61,14 @@ enum SpellCastFlags
     CAST_FLAG_UNKNOWN_32         = 0x80000000,
 };
 
+//Spells casted on self should not be diminished.
+enum SpellFlags
+{
+    SPELL_FLAG_NORMAL = 0x00,
+    SPELL_FLAG_REFLECTED = 0x01,        // reflected spell
+    SPELL_FLAG_REDIRECTED = 0x02        // redirected spell
+};
+
 enum SpellRangeFlag
 {
     SPELL_RANGE_DEFAULT             = 0,
@@ -553,6 +561,9 @@ class Spell
         int32 m_casttime;                                   // Calculated spell cast time initialized only in Spell::prepare
         int32 m_channeledDuration;                          // Calculated channeled spell duration in order to calculate correct pushback.
         bool m_canReflect;                                  // can reflect this spell?
+
+        uint8 m_spellFlags;                                 // for spells whose target was changed in cast i.e. due to reflect
+
         bool m_autoRepeat;
         uint8 m_runesState;