Merge r1753777 from trunk:

Permit mod_proxy_hcheck.c to compile on Win32 32-bit architectures.
This decoration is required for all apr_thread fn() entry points,
at least on some platforms.


Submitted by: wrowe
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1755072 13f79535-47bb-0310-9956-ffa450edef68