msdos build correction

ENHANCED_SYMBOLS is defined by default in config.h.
The msdos build tried to #undef ENHANCED_SYMBOLS
in tilemap.c, but doing it in there created a mismatch
between the data struct definition for glyph_map in wintype.h
and the initializers generated in tilemap.c

Move the msdos build catch for ENHANCED_SYMBOLS to
one single place in config1.h so that the code and data agree.

win/share/tilemap.c

@@ -54,10 +54,6 @@ extern void exit(int);
 #endif
 #endif
 
-#if defined(CROSSCOMPILE) && defined(ENHANCED_SYMBOLS)
-#undef ENHANCED_SYMBOLS
-#endif
-
 struct {
     int idx;
     const char *tilelabel;