Improvement in the concat expr casting.
Improvement in the concat expr casting.

28msec/zorba,bgarrels/zorba,28msec/zorba,28msec/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,bgarrels/zorba,cezarfx/zorba,bgarrels/zorba,28msec/zorba,28msec/zorba,cezarfx/zorba,bgarrels/zorba,28msec/zorba,bgarrels/zorba,cezarfx/zorba,cezarfx/zorba,cezarfx/zorba,28msec/zorba,cezarfx/zorba,cezarfx/zorba,bgarrels/zorba,28msec/zorba,cezarfx/zorba,28msec/zorba,bgarrels/zorba