#270 Projects do not build when swapping source files.

[Stefan]

Main topic describing bug on codeblocks forums:

http://forums.codeblocks.org/index.php/topic,20763.0.html

The main problem is this:

1. Create a file main.cpp. build with main.cpp, remove it
2. Create a file main2.cpp. build with main2.cpp, remove it
3. build with main.cpp again. This builds nothing. The executable is still created from main2.cpp.