FIX: In Grid, 2nd Character Overwrites 1st If Old Value Is NULL

MORE INFORMATION

Steps to Reproduce Behavior

1. Run the following code from a program (.prg) file:

         PUBLIC oform1
         CREA TABLE nulltest (f1 N(10,2) NULL)
         FOR lni = 1 TO 5
            INSERT INTO nulltest VALUES (.NULL.)
         ENDFOR
         USE nulltest
   
         oform1=CREATEOBJECT("form1")
         oform1.SHOW
         RETURN
   
         DEFINE CLASS form1 AS FORM
   
            TOP = 0
            LEFT = 0
            HEIGHT = 268
            WIDTH = 378
            CAPTION = "Form1"
            NAME = "Form1"
   
            ADD OBJECT grd1 AS GRID WITH ;
               COLUMNCOUNT = 1, ;
               LEFT = 33, ;
               RECORDSOURCE = "nulltest", ;
               RECORDSOURCETYPE = 1, ;
               TOP = 28, ;
               NAME = "grd1", ;
               Column1.SPARSE = .F., ;
               Column1.NAME = "Column1"
         ENDDEFINE

2. Type in 25, then press the DOWN ARROW key.