aspell: Fix build with gcc7

(From OE-Core rev: 4d417d0a9bb71d6bf068481c5ac0e3e3b2601d66)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-support/aspell/aspell/gcc7.patch

@@ -0,0 +1,40 @@
+From 8089fa02122fed0a6394eba14bbedcb1d18e2384 Mon Sep 17 00:00:00 2001
+From: Kevin Atkinson <kevina@gnu.org>
+Date: Thu, 29 Dec 2016 00:50:31 -0500
+Subject: [PATCH] Compile Fixes for GCC 7.
+
+Closes #519.
+---
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Upstream-Status: Backport
+
+ modules/filter/tex.cpp | 2 +-
+ prog/check_funs.cpp    | 2 +-
+ 2 files changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/modules/filter/tex.cpp b/modules/filter/tex.cpp
+index a979539..19ab63c 100644
+--- a/modules/filter/tex.cpp
++++ b/modules/filter/tex.cpp
+@@ -174,7 +174,7 @@ namespace {
+ 
+     if (c == '{') {
+ 
+-      if (top.in_what == Parm || top.in_what == Opt || top.do_check == '\0')
++      if (top.in_what == Parm || top.in_what == Opt || *top.do_check == '\0')
+ 	push_command(Parm);
+ 
+       top.in_what = Parm;
+diff --git a/prog/check_funs.cpp b/prog/check_funs.cpp
+index db54f3d..89ee09d 100644
+--- a/prog/check_funs.cpp
++++ b/prog/check_funs.cpp
+@@ -647,7 +647,7 @@ static void print_truncate(FILE * out, const char * word, int width) {
+     }
+   }
+   if (i == width-1) {
+-    if (word == '\0')
++    if (*word == '\0')
+       put(out,' ');
+     else if (word[len] == '\0')
+       put(out, word, len);

meta/recipes-support/aspell/aspell_0.60.6.1.bb

@@ -6,7 +6,9 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=7fbc338309ac38fefcd64b04bb903e34"
 
 PR = "r1"
 
-SRC_URI = "${GNU_MIRROR}/aspell/aspell-${PV}.tar.gz"
+SRC_URI = "${GNU_MIRROR}/aspell/aspell-${PV}.tar.gz \
+           file://gcc7.patch \
+          "
 SRC_URI[md5sum] = "e66a9c9af6a60dc46134fdacf6ce97d7"
 SRC_URI[sha256sum] = "f52583a83a63633701c5f71db3dc40aab87b7f76b29723aeb27941eff42df6e1"