[tlbuild] [PATCH 1/1] Fix -Wimplicit-int, -Wstrict-prototypes

[Karl Berry]

     '#include <stdlib.h>' has absolutely 0 risk. 

I disagree.

     <stdlib.h> is standard
    since ca. SunOS 4 (in the 1990ies).

The existence of the header can be assumed, I suppose. Its contents,
especially wrt prototypes, are not perfect on many systems. That was my
point. I've seen plenty of clashes because of stupid mismatched
declarations, wrong declarations in the system includes, etc. All for
zero benefit.

Whatever.