Core/Misc: Fixed static analysis issue

CID 1306242: Non-static class member "SpellID" is not initialized in this constructor nor in any functions that it calls

src/server/game/Server/Packets/CombatLogPackets.h

@@ -178,7 +178,7 @@ namespace WorldPackets
 
             ObjectGuid Target;
             ObjectGuid Caster;
-            int32 SpellID;
+            int32 SpellID = 0;
         };
     }
 }