Fix https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=6737

As suggested by njtaylor0101 [AT] gmail.com: we (always) check for the gthread
module when checking glib so there's no need to check for it when checking GTK.
This prevents us, when configuring with gtk3, for checking for gthread-2.0
version 3.0.0 or later.

svn path=/trunk/; revision=40684

aclocal-fallback/gtk-2.0.m4

@@ -15,11 +15,8 @@ AC_ARG_ENABLE(gtktest, [  --disable-gtktest       do not try to compile and run
   pkg_config_args=gtk+-2.0
   for module in . $4
   do
-      case "$module" in
-         gthread)
-             pkg_config_args="$pkg_config_args gthread-2.0"
-         ;;
-      esac
+      # No modules to check for now
+      :
   done
 
   no_gtk=""

aclocal-fallback/gtk-3.0.m4

@@ -15,11 +15,8 @@ AC_ARG_ENABLE(gtktest, [  --disable-gtktest       do not try to compile and run
   pkg_config_args=gtk+-3.0
   for module in . $4
   do
-      case "$module" in
-         gthread)
-             pkg_config_args="$pkg_config_args gthread-2.0"
-         ;;
-      esac
+      # No modules to check for now
+      :
   done
 
   no_gtk=""

configure.in

@@ -801,7 +801,7 @@ if test "x$enable_wireshark" = "xyes"; then
 			have_gtk=yes
 	                AC_DEFINE(HAVE_GTK, 1,
 			    [Define to 1 if compiling with GTK])
-	        ], have_gtk=no, gthread)
+	        ], have_gtk=no)
 
 	else
 		AM_PATH_GTK_2_0(2.12.0,
@@ -811,7 +811,7 @@ if test "x$enable_wireshark" = "xyes"; then
 			have_gtk=yes
 			AC_DEFINE(HAVE_GTK, 1,
 			    [Define to 1 if compiling with GTK])
-		], have_gtk=no, gthread)
+		], have_gtk=no)
 	fi
 else
 	have_gtk=no