commit 5851b5a0fdec075985b51e8329c63a4ecf884240
Author: Koxinga <ouyang.leyan@hotmail.com>
Date:   Sat May 26 13:02:42 2012 +0800

    Treat empty query in query builder

diff --git a/src/gui/qgsquerybuilder.cpp b/src/gui/qgsquerybuilder.cpp
index 8094c4b..645a9c1 100644
--- a/src/gui/qgsquerybuilder.cpp
+++ b/src/gui/qgsquerybuilder.cpp
@@ -181,9 +181,6 @@ void QgsQueryBuilder::test()
 
 void QgsQueryBuilder::accept()
 {
-  // if user hits Ok and there is no query, skip the validation
-  if ( !txtSQL->toPlainText().trimmed().isEmpty() )
-  {
     if ( !mLayer->setSubsetString( txtSQL->toPlainText() ) )
     {
       //error in query - show the problem
@@ -201,7 +198,6 @@ void QgsQueryBuilder::accept()
       }
       return;
     }
-  }
 
   QDialog::accept();
 }