fix build with clang6; from FreeBSD; ok schwarze@

games/enigma/Makefile

@@ -1,9 +1,10 @@
-# $OpenBSD: Makefile,v 1.33 2018/03/13 21:13:48 jasper Exp $
+# $OpenBSD: Makefile,v 1.34 2018/04/16 14:10:02 naddy Exp $
 
 COMMENT=	Oxyd/Rock'n'Roll clone
 
 V=		1.21
 DISTNAME=	enigma-${V}
+REVISION=	0
 
 CATEGORIES=	games x11
 

games/enigma/patches/patch-src_Value_cc

@@ -0,0 +1,14 @@
+$OpenBSD: patch-src_Value_cc,v 1.1 2018/04/16 14:10:02 naddy Exp $
+
+Index: src/Value.cc
+--- src/Value.cc.orig
++++ src/Value.cc
+@@ -149,7 +149,7 @@ namespace enigma {
+                 val.dval[0] = false;
+                 break;
+             case OBJECT :
+-                val.dval[0] = (double) NULL;
++                val.dval[0] = 0;
+                 break;
+             case NAMEDOBJECT:
+                 ASSERT(false, XLevelRuntime, "Value: illegal type usage");

games/enigma/patches/patch-src_lev_Proxy_cc

@@ -0,0 +1,14 @@
+$OpenBSD: patch-src_lev_Proxy_cc,v 1.1 2018/04/16 14:10:02 naddy Exp $
+
+Index: src/lev/Proxy.cc
+--- src/lev/Proxy.cc.orig
++++ src/lev/Proxy.cc
+@@ -933,7 +933,7 @@ namespace enigma { namespace lev {
+                     } else if (haveLocalCopy) {
+                         // plain file
+                         basic_ifstream<char> ifs(absExtPath.c_str(), ios::binary | ios::in);
+-                        if (ifs != NULL)
++                        if (ifs)
+                             Readfile(ifs, extCode);
+                         else
+                             haveLocalCopy = false;