Description of problem:
The CDT debug ui does not give any warnings when debugging a source
file which is newer than the executable.

Version-Release number of selected component (if applicable):
20040329 nightly

How reproducible:
Every time

Steps to Reproduce:
1. Build C/C++ project
2. Modify a source file by adding a few blank lines between two
executable lines of code
3. Save file but do not rebuild project
4. Set breakpoint at first of the executable lines
5. Step
  
Actual results:
Shows file at blank executable line

Expected results:
Warning that source file is newer than executable

Additional info:
Perhaps this is just related to 119367 (no rebuild on resource
modification), but the debug ui should be able to cope with this.