math/sc-im: fix segmentation fault upon :wq

- bug reported upstream as andmarti1424/sc-im#280

PR:		227861
Submitted by:	Samy Mahmoudi <samy.mahmoudi@gmail.com>
Approved by:	bapt (maintainer timeout)

math/sc-im/Makefile

@@ -1,9 +1,10 @@
 # $FreeBSD$
 
-PORTNAME=	sc-im
-PORTVERSION=	0.7.0
+PORTNAME=		sc-im
+PORTVERSION=		0.7.0
 DISTVERSIONPREFIX=	v
-CATEGORIES=	math
+PORTREVISION=		1
+CATEGORIES=		math
 
 MAINTAINER=	bapt@FreeBSD.org
 COMMENT=	Ncurses spreadsheet program for terminal

math/sc-im/files/patch-cmds__command.c

@@ -0,0 +1,11 @@
+--- cmds_command.c.orig	2018-08-03 06:04:39 UTC
++++ cmds_command.c
+@@ -826,7 +826,7 @@ void do_commandmode(struct block * sb) {
+             exec_cmd(line);
+
+         } else if ( inputline[0] == L'w' ) {
+-            if (savefile() == 0 && ! wcscmp(inputline, L"wq")) shall_quit = 1;
++            if (savefile() == 0 && ! wcsncmp(inputline, L"wq", 2)) shall_quit = 1;
+
+         } else if ( ! wcsncmp(inputline, L"file ", 5) ) {
+

math/sc-im/files/patch-doc

@@ -0,0 +1,11 @@
+--- doc.orig	2018-08-03 06:09:42 UTC
++++ doc
+@@ -328,6 +328,8 @@ Commands for handling cell content:
+      :w {file}   Save the current spreadsheet as {file}.
+      :w! {file}  Save the current spreadsheet as {file}, forcing an overwrite
+                  if {file} already exists.
++     :wq         Save the current spreadsheet and quit SC-IM.
++     :wq {file}  Save the current spreadsheet as {file} and quit SC-IM.
+
+      :h          Show this help.
+      :help       Show this help.

math/sc-im/files/patch-file.c

@@ -0,0 +1,16 @@
+--- file.c.orig	2017-12-13 17:48:59 UTC
++++ file.c
+@@ -202,7 +202,12 @@ int savefile() {
+     del_range_chars(name, 0, 1 + force_rewrite);
+     wordexp(name, &p, 0);
+
+-    if (! force_rewrite && p.we_wordv[0] && file_exists(p.we_wordv[0])) {
++    if (wcslen(inputline) > 2 && (!p.we_wordv || !p.we_wordv[0])) {
++       sc_error("Trailing space(s)");
++       return -1;
++    }
++
++    if (! force_rewrite && p.we_wordv && p.we_wordv[0] && file_exists(p.we_wordv[0])) {
+         sc_error("File already exists. Use \"!\" to force rewrite.");
+         wordfree(&p);
+         return -1;