rogue4: rearrange some includes.

Using MSVC with pdcurses, curses.h has to be included after windows.h
and before process.h.  This is apparently because bool is now a
built-in type which pdcurses is not allowed to redefine.  But I don't
entirely understand how the headers are interacting, and I don't think
the MSDN page does either.

rogue4/mdport.c

@@ -36,7 +36,6 @@
 #if defined(_WIN32)
 #include <Windows.h>
 #include <Lmcons.h>
-#include <process.h>
 #include <shlobj.h>
 #include <sys/types.h>
 #include <io.h>
@@ -73,6 +72,10 @@ char *strdup(const char *s);
 #include <term.h>
 #endif
 
+#if defined(_WIN32)
+#include <process.h>
+#endif
+
 #include <stdio.h>
 #include <fcntl.h>
 #include <limits.h>