Use column name for getColumnLabel (firebird-sdbc).

Change-Id: I2e92c5dbdfe4cb9d8441e2d120b139fe97209d3e

connectivity/source/drivers/firebird/FResultSet.cxx

@@ -321,6 +321,10 @@ sal_Int32 SAL_CALL OResultSet::findColumn(const OUString& columnName)
             break;
     }
 
+    // TODO: add appropriate error
+    if (i > nLen)
+        throw SQLException();
+
     return i;
 }
 // -------------------------------------------------------------------------

connectivity/source/drivers/firebird/FResultSetMetaData.cxx

@@ -120,8 +120,7 @@ OUString SAL_CALL OResultSetMetaData::getColumnLabel(sal_Int32 column)
     throw(SQLException, RuntimeException)
 {
     // TODO: clarify what this is -- probably not the alias
-    (void) column;
-    return OUString();
+    return getColumnName(column);
 }
 
 OUString SAL_CALL OResultSetMetaData::getColumnServiceName(sal_Int32 column)