A ':' in the data file was always interpreted as a category divider,

even if escaped.  Changed code so that the next character after a '\'
    is skipped.  This should not cause a buffer overflow, as backslashes
    at the end of a line are handled earlier in the code.

    Also correct a slight grammatical nit in the bard datfile.

PR:	3777, 3917

games/quiz/datfiles/bard

@@ -212,7 +212,7 @@ Antony [and|&] Cleopatra{ II-iii}:\
 Enobarbus
 Give me some music\: music, moody food:\
 Of us that trade in love{.}:\
-Antony [and|&] Cleopatra{II-v}:\
+Antony [and|&] Cleopatra{ II-v}:\
 Cleopatra
 'Tis better playing with a lion's whelp,:\
 Than with an old one dying{.}:\

games/quiz/quiz.c

@@ -299,6 +299,7 @@ next_cat(s)
 		case '\0':
 			return (NULL);
 		case '\\':
+			s++;
 			break;
 		case ':':
 			return (s);