Removing casts from code

[Roland McGrath]

> These changes are completely out of question.  I want to have return
> values of allocation functions casted to the correct type.  Some code
> you might want some day use with a C++ compiler and it also happened
> several times that I changed malloc to alloca() in which can the cast is
> sometimes needed.

The code is C (post-1989 C), not C++.  If someday one actually uses some
code as C++ source, then it will be worthwhile to add the casts as needed.
alloca returns void * as well and I have never heard of any reason a cast
would be needed.  There is no reason to bother removing casts from existing
code, but there is no reason to add them to new code either.