UltraRogue: add location for character files.

When using the -n option, UltraRogue will look for character files in a
single location, similar to save files.

The location is chosen by defining CHRDIR in getplay.c, at least until
UltraRogue gets integrated with the build systems.

urogue/getplay.c

@@ -16,6 +16,8 @@
 #include <string.h>
 #include "rogue.h"
 
+#define CHRDIR "."
+
 #define I_STR       0
 #define I_INTEL     1
 #define I_WISDOM    2
@@ -36,6 +38,16 @@ static void get_chr_filename(char *filename, int size)
  
     home = getenv("HOME");
 
+#ifdef CHRDIR
+    if (use_savedir)
+    {
+        strncpy(filename, CHRDIR, size);
+        filename[size-1] = '\0';
+        snprintf(filename, size, "%s/%d-%.80s.chr", CHRDIR, md_getuid(),
+                        whoami);
+        return;
+    }
+#endif
     if (home) {
         if ((int)strlen(home) < (size - 12) )
         {