Make us work on FreeBSD again by working around their different mmap()

implementation.

README

@@ -44,10 +44,8 @@ Linux info:
   it's best to have a current kernel such as 2.4.x.
 
 FreeBSD info:
-  Wine should build on FreeBSD 4.x and FreeBSD 5.x before 5.3, but will
-  generally not work on these systems due to issues with threading and
-  mmap().  In fact, even on FreeBSD 5.3 you will need the kernel patch
-  posted at <http://www.freebsd.org/cgi/query-pr.cgi?pr=73092>.
+  Wine should build on FreeBSD 4.x and FreeBSD 5.x, but versions before
+  FreeBSD 5.3 will generally not work properly.
  
   More information can be found in the FreeBSD ports tree at
   <ftp://ftp.freebsd.org/pub/FreeBSD/ports/ports/emulators/wine/>.

libs/wine/mmap.c

@@ -174,6 +174,11 @@ void *wine_anon_mmap( void *start, size_t size, int prot, int flags )
 
     if (!(flags & MAP_FIXED))
     {
+#ifdef __FreeBSD__
+        /* Even FreeBSD 5.3 does not properly support NULL here. */
+        if( start == NULL ) start = (void *)0x110000;
+#endif
+
 #ifdef MAP_TRYFIXED
         /* If available, this will attempt a fixed mapping in-kernel */
         flags |= MAP_TRYFIXED;