PR# 15092 Adding pre-compilation task with empty command causes config file parse error

Adding a pre-compilation (or presumably post-compilation task) with an
empty Command causes a VD00 general parse error when parsing the 
configuration file.  Subsequent attempts to fix the pre-compilation task
via the Change Project Settings button fail with a parse error.  I should
not be able to produce and invalid config file through the Project Settings
interface.

Compile with attached class and config file.
Click on Change Project Settings.
Expand Advanced tree, right-click on Tasks and select Add Pre-Compilation Task.
Clear the Command field, which starts out with value "new".
Click OK.
Compile.
Estudio reports VD00 general configuration parsing error at line 8,
   column 33.
Click on Change Project Settings to try to correct the error.
Estudio pops up an error window that says there is a parse error in
   test.ecf.

Fixed in rev#78143. Thank you for the report.

Attachments for problem report #15092