[svn] Add some assert for better debug.

--HG--
branch : trunk

src/game/Unit.cpp

@@ -425,6 +425,7 @@ bool Unit::IsWithinCombatDist(Unit *obj, float dist2compare) const
 
 void Unit::GetRandomContactPoint( const Unit* obj, float &x, float &y, float &z, float distance2dMin, float distance2dMax ) const
 {
+    assert(GetCombatReach() > 0.1);
 	uint32 attacker_number = getAttackers().size();
     if(attacker_number > 0) --attacker_number;
 	GetNearPoint(obj,x,y,z,obj->GetCombatReach(), distance2dMin+(distance2dMax-distance2dMin)*rand_norm()
@@ -983,6 +984,7 @@ void Unit::CastSpell(Unit* Victim, uint32 spellId, bool triggered, Item *castIte
 
 void Unit::CastSpell(Unit* Victim,SpellEntry const *spellInfo, bool triggered, Item *castItem, Aura* triggredByAura, uint64 originalCaster)
 {
+    assert(Victim);
     if(!spellInfo)
     {
         sLog.outError("CastSpell: unknown spell by caster: %s %u)", (GetTypeId()==TYPEID_PLAYER ? "player (GUID:" : "creature (Entry:"),(GetTypeId()==TYPEID_PLAYER ? GetGUIDLow() : GetEntry()));