Core/DBLayer: Fixed some crashes caused by incorrect prepared statements usage

Closes #5934

src/server/game/Handlers/CharacterHandler.cpp

@@ -1724,7 +1724,6 @@ void WorldSession::HandleCharFactionOrRaceChange(WorldPacket& recv_data)
 
     // Switch Languages
     // delete all languages first
-
     stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_CHAR_SKILL_LANGUAGES);
     stmt->setUInt32(0, lowGuid);
     trans->Append(stmt);
@@ -1733,20 +1732,17 @@ void WorldSession::HandleCharFactionOrRaceChange(WorldPacket& recv_data)
     stmt = CharacterDatabase.GetPreparedStatement(CHAR_INS_CHAR_SKILL_LANGUAGE);
     stmt->setUInt32(0, lowGuid);
 
-
     // Faction specific languages
-    if (team == BG_TEAM_ALLIANCE)
+    if (team == BG_TEAM_HORDE)
-    {
-        stmt->setUInt16(1, 98);
-    }
-    else if (team == BG_TEAM_HORDE)
-    {
         stmt->setUInt16(1, 109);
-    }
+    else
+        stmt->setUInt16(1, 98);
 
     trans->Append(stmt);
 
     // Race specific languages
+    if (race != RACE_ORC && race != RACE_HUMAN)
+    {
         stmt = CharacterDatabase.GetPreparedStatement(CHAR_INS_CHAR_SKILL_LANGUAGE);
         stmt->setUInt32(0, lowGuid);
 
@@ -1779,6 +1775,7 @@ void WorldSession::HandleCharFactionOrRaceChange(WorldPacket& recv_data)
         }
 
         trans->Append(stmt);
+    }
 
     if (recv_data.GetOpcode() == CMSG_CHAR_FACTION_CHANGE)
     {

src/server/game/Handlers/PetitionsHandler.cpp

@@ -912,7 +912,7 @@ void WorldSession::HandleTurnInPetitionOpcode(WorldPacket & recv_data)
     stmt->setUInt32(0, GUID_LOPART(petitionGuid));
     trans->Append(stmt);
 
-    stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_PETITION_SIGNATURE);
+    stmt = CharacterDatabase.GetPreparedStatement(CHAR_DEL_PETITION_SIGNATURE_BY_GUID);
     stmt->setUInt32(0, GUID_LOPART(petitionGuid));
     trans->Append(stmt);