$OpenBSD: patch-modules_filter_tex_cpp,v 1.1 2018/04/07 22:50:15 naddy Exp $

Fix compilation with clang 6.
https://git.savannah.gnu.org/cgit/aspell.git/patch/?id=8089fa02122fed0a6394eba14bbedcb1d18e2384

Index: modules/filter/tex.cpp
--- modules/filter/tex.cpp.orig
+++ 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;
