fix compile errors in ptx1, and turn on compiler warnings.

Reference: /n/atom/patch/applied/manmkfix
Date: Mon Mar 10 17:07:53 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/lib/man/permind/mkfile	Mon Mar 10 17:07:37 2014
+++ /sys/lib/man/permind/mkfile	Mon Mar 10 17:07:37 2014
@@ -7,8 +7,12 @@
 
 permindex:V: $O.ptx1
 	rm -f junk*
-	for (i in /sys/man/[0-9])
-		makind1 $i >> junk0
+	if (test -f sec)
+		for (i in `{cat sec})
+			makind1 $i >> junk0
+	if not
+		for (i in /sys/man/[0-9] /sys/man/[1-9][0-9])
+			makind1 $i >> junk0
 	sed 's/0intro/intro/g
 	s/  +/ /g
 	s/ +$//' junk0 > junk1
@@ -27,7 +31,7 @@
 	' junk3 >permindex
 
 $O.ptx1: ptx1.c
-	$CC ptx1.c
+	$CC $CFLAGS ptx1.c
 	$LD -o $target ptx1.$O -lstdio
 
 clean:V:
--- /sys/lib/man/permind/ptx1.c	Mon Mar 10 17:07:37 2014
+++ /sys/lib/man/permind/ptx1.c	Mon Mar 10 17:07:37 2014
@@ -106,6 +106,9 @@
 char *bfile;	/*contains user supplied break chars */
 FILE *bptr;
 
+/* squelch warnings */
+#undef putc
+
 char *cmds;
 
 void
@@ -265,9 +268,7 @@
 	remove(kfile);
  */
 	fflush(0);
-	_exits(0);
-/* I don't know what's wrong with the atexit func... */
-/*	exits(0);	*/
+	exits(0);
 }
 
 void
@@ -450,7 +451,7 @@
 void
 getsort(void)
 {
-	char *tilde, *linep, *markp;
+	char *linep, *markp;
 	int i0, i1, i2, i3, i4, i5, i6, i7, w0, w6;
 
 	if((sortptr = fopen(sortfile, "r")) == NULL)