enc_stat[], hu_stat[]

The definition of enc_stat[] got changed by a pull request nearly a
year ago ('const char *enc_stat[]' -> 'const char *const enc_stat[]')
but the separate declarations for it weren't changed to match.

Make the same change for hu_stat[].  Not sure why the pull request
didn't include it since the old declaration and the usage are same.

The curses one is in code that isn't used.

win/Qt/qt_stat.cpp

@@ -76,6 +76,9 @@
 
 extern "C" {
 #include "hack.h"
+
+extern const char *const enc_stat[]; /* from botl.c */
+extern const char *const hu_stat[]; /* from eat.c */
 }
 
 #include "qt_pre.h"
@@ -90,9 +93,6 @@ extern "C" {
 #include "qt_str.h"
 #include "qt_xpms.h"
 
-extern const char *enc_stat[]; /* from botl.c */
-extern const char *hu_stat[]; /* from eat.c */
-
 extern int qt_compact_mode;
 
 namespace nethack_qt_ {