msgop.2, semop.2, lgamma.3, tgamma.3, mdoc.samples.7: Global fix: s/non-positive/nonpositive/

The tendency in English, as prescribed in style guides like
Chicago MoS, is towards removing hyphens after prefixes
like "non-" etc.

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>

man2/msgop.2

@@ -330,7 +330,7 @@ Sleeping on a full message queue condition, the process caught a signal.
 .B EINVAL
 Invalid
 .I msqid
-value, or non-positive
+value, or nonpositive
 .I mtype
 value, or
 invalid

man2/semop.2

@@ -370,7 +370,7 @@ The semaphore set doesn't exist, or
 .I semid
 is less than zero, or
 .I nsops
-has a non-positive value.
+has a nonpositive value.
 .TP
 .B ENOMEM
 The

man3/lgamma.3

@@ -91,7 +91,7 @@ positive infinity is returned.
 
 If
 .I x
-is a non-positive integer,
+is a nonpositive integer,
 a pole error occurs,
 and the functions return
 .RB + HUGE_VAL ,
@@ -117,7 +117,7 @@ when calling these functions.
 .PP
 The following errors can occur:
 .TP
-Pole error: \fIx\fP is a non-positive integer
+Pole error: \fIx\fP is a nonpositive integer
 .I errno
 is set to
 .\" FIXME . glibc 2.8 gives EDOM!

man3/tgamma.3

@@ -36,7 +36,7 @@ The Gamma function is defined by
 .sp
     Gamma(x) = integral from 0 to infinity of t^(x\-1) e^\-t dt
 .sp
-It is defined for every real number except for non-positive integers.
+It is defined for every real number except for nonpositive integers.
 For nonnegative integral \fIm\fP one has
 .sp
     Gamma(m+1) = m!

man7/mdoc.samples.7

@@ -2576,7 +2576,7 @@ by the process to pages not loaded in core.
 numerical user-id of process owner
 .It PPID
 numerical ID of parent of process process priority
-(non-positive when in non-interruptible wait)
+(nonpositive when in non-interruptible wait)
 .El
 .Pp
 The raw text:
@@ -2593,7 +2593,7 @@ The raw text:
 \&numerical user ID of process owner
 \&.It PPID
 \&numerical ID of parent of process process priority
-\&(non-positive when in non-interruptible wait)
+\&(nonpositive when in non-interruptible wait)
 \&.El
 .Ed
 .Pp