Tweak mpm pending C++ support in the mkfiles.

src/cmd/mpm/mkfile

@@ -1,6 +1,6 @@
 <$PLAN9/src/mkhdr
 
-TARG=aux/pm
+TARG=auxpm
 OFILES=misc.$O\
 	slug.$O\
 	range.$O\
@@ -9,10 +9,7 @@ OFILES=misc.$O\
 
 HFILES=misc.h\
 
-BIN=/$objtype/bin
 <$PLAN9/src/mkone
-CC=c++/$CC
-LD=c++/$LD
 CFLAGS=
 
 slug.$O:	slug.h

src/cmd/mpm/range.cc

@@ -304,7 +304,7 @@ static void markbreak(slug *p)
 {
 	// Mark impermissible breakpoints in BS's.
 	// The parm field of a VBOX is >0 if we shouldn't break after it.
-	int parm;		// how many lines must stay on page
+	int parm = 0;		// how many lines must stay on page
 	int goahead = 1;	// true until we see the next BS
 	int nowmark = 0;	// true when we should be marking
 	int n = 0;

src/cmd/mpm/tmac.pm

@@ -1,5 +1,5 @@
 .\" 10/22/92 activate next line before installing
-.pi /$objtype/bin/aux/pm
+.pi #9/bin/auxpm
 .
 .		\" IZ - initialization
 .de IZ