documentation for mpsignif was incorrect.

actually, although the documentation is not
wrong, mplowbits0(0) and mplowbits0(1) both return 0,
which could be construed as an inconsistency.

Notes:
Thu Feb 16 09:23:48 EST 2006 rsc
    nice catch!  i made a different change that i think is clearer.  please check it.
    
    russ


Reference: /n/sources/patch/applied/mpman
Date: Wed Feb 15 16:39:22 CET 2006
Reviewed-by: rsc

--- /sys/man/2/mp	Wed Feb 15 16:36:01 2006
+++ /sys/man/2/mp	Wed Feb 15 16:35:48 2006
@@ -479,13 +479,13 @@
 .IR m .
 .PP
 .I Mpsignif
-returns the bit offset of the left most 1 bit in
+returns one more than the bit offset of the left most 1 bit in
 .IR b .
 .I Mplowbits0
 returns the bit offset of the right most 1 bit.
 For example, for 0x14,
 .I mpsignif
-would return 4 and
+would return 5 and
 .I mplowbits0
 would return 2.
 .PP