FIX Onyxia Crash (#2062)

Solve these two problems #2043 #1981
@Regrad is the main contributor of the code, while I was just helping to
submit the pull request. Express my gratitude to him.
After testing, the code is proven to be effective.

PULL_REQUEST_TEMPLATE.md

@@ -109,6 +109,7 @@ If yes, please specify:
 AI assistance is allowed, but all submitted code must be fully understood, reviewed, and owned by the contributor.
 Any AI-influenced changes must be verified against existing CORE and PB logic. We expect contributors to be honest
 about what they do and do not understand.
+
 ---
 
 ## Final Checklist

src/Ai/Raid/Onyxia/Action/RaidOnyxiaActions.cpp

@@ -45,8 +45,19 @@ bool RaidOnyxiaSpreadOutAction::Execute(Event event)
     if (!boss)
         return false;
 
-    Player* target = boss->GetCurrentSpell(CURRENT_GENERIC_SPELL)->m_targets.GetUnitTarget()->ToPlayer();
-    if (target != bot)
+    // Trigger may fire on one tick, but the action can execute on a later tick.
+    // By that time the cast may have finished, so current spell can be null.
+    Spell* currentSpell = boss->GetCurrentSpell(CURRENT_GENERIC_SPELL);
+    if (!currentSpell || !currentSpell->m_spellInfo)
+        return false;
+
+    // Fireball
+    if (currentSpell->m_spellInfo->Id != 18392)
+        return false;
+
+    Unit* unitTarget = currentSpell->m_targets.GetUnitTarget();
+    Player* target = unitTarget ? unitTarget->ToPlayer() : nullptr;
+    if (!target || target != bot)
         return false;
 
     // bot->Yell("Spreading out — I'm the Fireball target!", LANG_UNIVERSAL);
@@ -60,7 +71,7 @@ bool RaidOnyxiaMoveToSafeZoneAction::Execute(Event event)
         return false;
 
     Spell* currentSpell = boss->GetCurrentSpell(CURRENT_GENERIC_SPELL);
-    if (!currentSpell)
+    if (!currentSpell || !currentSpell->m_spellInfo)
         return false;
 
     uint32 spellId = currentSpell->m_spellInfo->Id;

src/Ai/Raid/Onyxia/Trigger/RaidOnyxiaTriggers.cpp

@@ -17,7 +17,7 @@ bool OnyxiaDeepBreathTrigger::IsActive()
     // Check if Onyxia is casting
     Spell* currentSpell = boss->GetCurrentSpell(CURRENT_GENERIC_SPELL);
 
-    if (!currentSpell)
+    if (!currentSpell || !currentSpell->m_spellInfo)
         return false;
 
     uint32 spellId = currentSpell->m_spellInfo->Id;
@@ -65,7 +65,7 @@ bool RaidOnyxiaFireballSplashTrigger::IsActive()
 
     // Check if Onyxia is casting Fireball
     Spell* currentSpell = boss->GetCurrentSpell(CURRENT_GENERIC_SPELL);
-    if (!currentSpell || currentSpell->m_spellInfo->Id != 18392)  // 18392 is the classic Fireball ID
+    if (!currentSpell || !currentSpell->m_spellInfo || currentSpell->m_spellInfo->Id != 18392)  // 18392 is the classic Fireball ID  // 18392 is the classic Fireball ID
         return false;
 
     GuidVector nearbyUnits = AI_VALUE(GuidVector, "nearest friendly players");