Drop USE_GROFF (white space differences only).

While here, fix a markup error in nmixer(1) that loses text.  Bump.

audio/mp3blaster/Makefile

@@ -1,9 +1,9 @@
-# $OpenBSD: Makefile,v 1.17 2015/02/18 16:15:37 naddy Exp $
+# $OpenBSD: Makefile,v 1.18 2015/04/04 14:45:36 schwarze Exp $
 
 COMMENT=	text console audio player with an interactive interface
 
 DISTNAME=	mp3blaster-3.2.5
-REVISION=	0
+REVISION=	1
 CATEGORIES=	audio
 HOMEPAGE=	http://mp3blaster.sourceforge.net/
 
@@ -25,7 +25,6 @@ CONFIGURE_ARGS=	--without-esd \
 		--without-sdl \
 		--with-sndio
 CONFIGURE_ENV+=	ac_cv_lib_ossaudio_main=no
-USE_GROFF =	Yes
 
 post-extract:
 	@cp ${FILESDIR}/sndioplayer.cc ${WRKSRC}/mpegsound

audio/mp3blaster/patches/patch-nmixer_1

@@ -0,0 +1,13 @@
+$OpenBSD: patch-nmixer_1,v 1.1 2015/04/04 14:45:36 schwarze Exp $
+--- nmixer.1.orig	Sat Jan 24 15:25:12 2009
++++ nmixer.1	Sat Apr  4 15:38:09 2015
+@@ -21,7 +21,8 @@ volume for the currently highlighted device, and (if y
+ you can use home/end/PgUp/PgDn on the numerical keyboard to set left
+ and right volume independantly. You can also use 0..5 to set the
+ volume to the position indicated by the numbers on top of the screen.
+-.PPIf a device can be recorded from, red brackets will be displayed under
++.PP
++If a device can be recorded from, red brackets will be displayed under
+ the device's name. If it's selected as recording source, a red 'X' is
+ displayed as well. You can set a recording device with the space bar.
+ .PP