Utils: Add iterator constructors to small string

Change-Id: I34e15177268f0733200d25c90fd935485c3176ae
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/libs/sqlite/sqlitebasestatement.cpp

@@ -716,7 +716,7 @@ StringType convertToTextForColumn(sqlite3_stmt *sqlStatment, int column)
         break;
     }
 
-    return StringType{"", 0};
+    return {};
 }
 } // namespace