fix to sw colormaps (MSVC is stupid)

fixed clear command from crashing
added ^h for toggleable half-alpha (still not rendered yet)
added ^&?? for extended fg/bg colors: (poosibly temporary?)
- first ? corresponds to foreground
- second ? corresponds to background
- valid characters for ? are 0-9, A-F and -
- hexadecimal number represents a color from CGA RGBI colors
- -(dash) represents default color for FG, clear for BG


git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@1838 fc73d0e0-1445-4013-8a0c-d673dee63da5

engine/common/console.h

@@ -80,6 +80,8 @@ extern conchar_t q3codemasks[MAXQ3COLOURS];
 
 #define		CON_TEXTSIZE	16384
 
+#define isextendedcode(x) ((x >= '0' && x <= '9') || (x >= 'A' && x <= 'F') || x == '-')
+
 typedef struct console_s
 {
 	char name[64];