Add missing headers for ports-gcc and remove trailing

whitespaces in DESCR and README.
OK bcallah@

games/dangerdeep/Makefile

@@ -1,9 +1,9 @@
-# $OpenBSD: Makefile,v 1.7 2018/10/24 14:28:02 sthen Exp $
+# $OpenBSD: Makefile,v 1.8 2019/01/18 14:41:05 cwen Exp $
 
 COMMENT =		WWII German submarine simulator
 
 PKGNAME =		dangerdeep-0.3.99.3327
-REVISION =		3
+REVISION =		4
 
 CATEGORIES =		games
 

games/dangerdeep/patches/patch-src_matrix3_h

@@ -0,0 +1,13 @@
+$OpenBSD: patch-src_matrix3_h,v 1.1 2019/01/18 14:41:05 cwen Exp $
+Fix missing header for ports-gcc
+Index: src/matrix3.h
+--- src/matrix3.h.orig
++++ src/matrix3.h
+@@ -24,6 +24,7 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, 
+ #ifndef MATRIX3_H
+ #define MATRIX3_H
+ 
++#include <string.h>
+ #include "matrix.h"
+ 
+ /// a 3x3 matrix, reimplemented for 3x3 case for speed issues

games/dangerdeep/pkg/DESCR

@@ -1,5 +1,5 @@
-Danger from the Deep (also known as dangerdeep) is a free, open source  
+Danger from the Deep (also known as dangerdeep) is a free, open source
 World War II German submarine simulator with advanced sound and graphics,
-multilanguage support, and multiplatform support. This game is planned as 
-tactical simulation and will be as realistic as the developers' time and 
+multilanguage support, and multiplatform support. This game is planned as
+tactical simulation and will be as realistic as the developers' time and
 knowledge of physics allows.

games/dangerdeep/pkg/README

@@ -1,4 +1,4 @@
-$OpenBSD: README,v 1.2 2018/09/04 12:46:12 espie Exp $
+$OpenBSD: README,v 1.3 2019/01/18 14:41:05 cwen Exp $
 
 +-----------------------------------------------------------------------
 | Running ${PKGSTEM} on OpenBSD
@@ -16,7 +16,7 @@ F4      Bridge
 F5      Map
 F6      Torpedo loading control
 F7      Damage control
-F8      Log book   
+F8      Log book
 F9      Success records
 F10     Free view