Core/DBLayer: Added compile time validation for prepared statement indexes passed to DatabaseWorkerPool::GetPreparedStatement turning mistakes like the one fixed in 0327927fa6 into compiler errors.

(cherry picked from commit 7c75160f59)

Conflicts:
	src/server/database/Database/Implementation/HotfixDatabase.h
	src/server/shared/DataStores/DB2StorageLoader.cpp
	src/server/shared/DataStores/DB2StorageLoader.h
	src/server/shared/DataStores/DB2Store.h

src/server/database/Database/QueryResult.cpp

@@ -123,6 +123,8 @@ m_length(NULL)
                         if (fetched_length < buffer_length)
                             *((char*)buffer + fetched_length) = '\0';
                         break;
+                    default:
+                        break;
                 }
 
                 m_rows[uint32(m_rowPosition) * m_fieldCount + fIndex].SetByteValue(