github pull request #235 - curses symbol set init

Fixes #235

For initial options under curses, specifying 'DECgraphics' as a
boolean rather than as 'symset:DECgraphics' wasn't overriding the
new default 'symset:curses'.  Since previously DECgraphics was
rejected for curses, it's possible that no one noticed.

win/curses/cursinit.c

@@ -785,9 +785,9 @@ curses_init_options()
     set_option_mod_status("eight_bit_tty", SET_IN_FILE);
 
     /* If we don't have a symset defined, load the curses symset by default */
-    if (symset[PRIMARY].fallback)
+    if (!symset[PRIMARY].explicitly)
         load_symset("curses", PRIMARY);
-    if (symset[ROGUESET].fallback)
+    if (!symset[ROGUESET].explicitly)
         load_symset("default", ROGUESET);
 
 #ifdef PDCURSES