socklen_t typedef conflict

[rna88]

When including the enet headers to build a project on Linux 4.13.12-1-ARCH x86_64 with gcc version 7.3.0, there is a typedef conflict with my system headers:

enet/unix.c:58:13: error: conflicting types for ‘socklen_t’
 typedef int socklen_t;
             ^~~~~~~~~
In file included from /usr/include/sys/socket.h:33:0,
                 from enet/unix.c:8:
/usr/include/bits/socket.h:33:21: note: previous declaration of ‘socklen_t’ was here
 typedef __socklen_t socklen_t;
                     ^~~~~~~~~
make: *** [<builtin>: enet/unix.o] Error 1

I added another define statement in unix.c line 58 to get around this for now:

#ifndef HAS_SOCKLEN_T
  #ifndef __socklen_t_defined
    typedef int socklen_t;
  #endif
#endif

[lsalzman]

Fixed.