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Add toascii() to ape

--- a/sys/include/ape/ctype.h

+++ b/sys/include/ape/ctype.h

@@ -50,6 +50,7 @@

 #ifdef _BSD_EXTENSION

 #define	isascii(c) (((unsigned int)(c))<0x80)

+#define	toascii( c ) ((unsigned)(c) & 0x007f)

 #endif

 #endif /* __CTYPE */