C pre-processor and ANSI standard

[WMM%ACC at sri-unix.UUCP]

From:  Waiming Mok <WMM at ACC>

Correction to spaces(n) macro:
#define spaces(n)   do {int i=(n);while (i--) putchar(' ');}while (0)
Sorry for the typo.  - Waiming Mok (wmm at ACC)
------