Can't use enum as last arg before varargs apparently

This should fix the Clang warning that Deuce reported:
str.cpp:131:18: warning: passing an object that undergoes default argument promotion to 'va_start' has undefined behavior

src/sbbs3/sbbs.h

@@ -744,7 +744,7 @@ public:
 
 	/* str.cpp */
 	char	format_text_buf[256]{};
-	char*	format_text(enum text, ...);
+	char*	format_text(int /* enum text */, ...);
 	char*	format_text(enum text, smbmsg_t*, ...);
 	int		get_text_num(const char* id);
 	const char* get_text(const char* id);

src/sbbs3/str.cpp

@@ -123,7 +123,7 @@ bool sbbs_t::load_user_text(void)
 	return replace_text(path);
 }
 
-char* sbbs_t::format_text(enum text num, ...)
+char* sbbs_t::format_text(int /* enum text */ num, ...)
 {
 	expand_atcodes(text[num], format_text_buf, sizeof format_text_buf, /* remsg: */NULL);
 	if(strcmp(text[num], format_text_buf) == 0) { // No @-codes expanded