tiny symset memory leak

Symbol set names weren't being freed upon exit.

include/extern.h

@@ -1,4 +1,4 @@
-/* NetHack 3.6	extern.h	$NHDT-Date: 1446516834 2015/11/03 02:13:54 $  $NHDT-Branch: master $:$NHDT-Revision: 1.513 $ */
+/* NetHack 3.6	extern.h	$NHDT-Date: 1447124656 2015/11/10 03:04:16 $  $NHDT-Branch: master $:$NHDT-Revision: 1.515 $ */
 /* Copyright (c) Steve Creps, 1988.				  */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -1638,6 +1638,7 @@ E void FDECL(set_option_mod_status, (const char *, int));
 E int FDECL(add_autopickup_exception, (const char *));
 E void NDECL(free_autopickup_exceptions);
 E int FDECL(load_symset, (const char *, int));
+E void NDECL(free_symsets);
 E void FDECL(parsesymbols, (char *));
 E struct symparse *FDECL(match_sym, (char *));
 E void NDECL(set_playmode);

src/drawing.c

@@ -1,4 +1,4 @@
-/* NetHack 3.6	drawing.c	$NHDT-Date: 1446975466 2015/11/08 09:37:46 $  $NHDT-Branch: master $:$NHDT-Revision: 1.48 $ */
+/* NetHack 3.6	drawing.c	$NHDT-Date: 1447124657 2015/11/10 03:04:17 $  $NHDT-Branch: master $:$NHDT-Revision: 1.49 $ */
 /* Copyright (c) NetHack Development Team 1992.                   */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -520,9 +520,7 @@ boolean name_too;
         free((genericptr_t) symset[which_set].desc);
     symset[which_set].desc = (char *) 0;
 
-    symset[which_set].nocolor = 0;
     symset[which_set].handling = H_UNK;
-    symset[which_set].desc = (char *) 0;
     symset[which_set].nocolor = 0;
     /* initialize restriction bits */
     symset[which_set].primary = 0;

src/options.c

@@ -1,4 +1,4 @@
-/* NetHack 3.6	options.c	$NHDT-Date: 1446854231 2015/11/06 23:57:11 $  $NHDT-Branch: master $:$NHDT-Revision: 1.236 $ */
+/* NetHack 3.6	options.c	$NHDT-Date: 1447124657 2015/11/10 03:04:17 $  $NHDT-Branch: master $:$NHDT-Revision: 1.238 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -4933,6 +4933,17 @@ int which_set;
     return 1;
 }
 
+void
+free_symsets()
+{
+    clear_symsetentry(PRIMARY, TRUE);
+    clear_symsetentry(ROGUESET, TRUE);
+
+    /* symset_list is cleaned up as soon as it's used, so we shouldn't
+       have to anything about it here */
+    /* assert( symset_list == NULL ); */
+}
+
 /* Parse the value of a SYMBOLS line from a config file */
 void
 parsesymbols(opts)

src/save.c

@@ -1,4 +1,4 @@
-/* NetHack 3.6	save.c	$NHDT-Date: 1446892456 2015/11/07 10:34:16 $  $NHDT-Branch: master $:$NHDT-Revision: 1.92 $ */
+/* NetHack 3.6	save.c	$NHDT-Date: 1447124658 2015/11/10 03:04:18 $  $NHDT-Branch: master $:$NHDT-Revision: 1.93 $ */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
@@ -1396,6 +1396,7 @@ freedynamicdata()
 
     /* miscellaneous */
     free_pickinv_cache();
+    free_symsets();
 #endif /* FREE_ALL_MEMORY */
 #ifdef STATUS_VIA_WINDOWPORT
     status_finish();