Fix a latent bug in the top-level compilation of function calls....

Fix a latent bug in the top-level compilation of function calls.

Calls to a non-global variable would go through the "call to a global"
path, rather than the "call to an arbitrary (other) expression" path.


Committed: http://code.google.com/p/v8/source/detail?r=3204

[Kevin Millikin (Chromium), 2009-11-03 11:21:29]

I've also restructured the code for clarity and cleaned up the comments for
accuracy.

[fschneider, 2009-11-03 12:05:43]

Yes, it's good to have the same cases for calls in the CodeGenSelector and the
FastCodeGenerator.

LGTM.