[glom] Replace deprecated Glib::ScopedPtr.

[Murray Cumming <murrayc src gnome org>]

commit d16e4b75c9ec1c363af8d0bc3b8e1d5d63421657
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Jan 26 13:51:24 2016 +0100

    Replace deprecated Glib::ScopedPtr.

 glom/libglom/data_structure/field.cc           |    2 +-
 glom/libglom/data_structure/glomconversions.cc |    2 +-
 glom/libglom/utils.cc                          |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/glom/libglom/data_structure/field.cc b/glom/libglom/data_structure/field.cc
index 472cb54..516f9da 100644
--- a/glom/libglom/data_structure/field.cc
+++ b/glom/libglom/data_structure/field.cc
@@ -321,7 +321,7 @@ Glib::ustring Field::to_file_format(const Gnome::Gda::Value& value, glom_field_t
     if(!str)
       return Glib::ustring();
 
-    auto result = Glib::ustring(Glib::ScopedPtr<char>(str).get());
+    auto result = Glib::ustring(Glib::make_unique_ptr_gfree(str).get());
 
     //Correction for text representations of image (binary) data:
     //Avoid arbitrary newlines in this text.
diff --git a/glom/libglom/data_structure/glomconversions.cc b/glom/libglom/data_structure/glomconversions.cc
index e8835ae..b0026b5 100644
--- a/glom/libglom/data_structure/glomconversions.cc
+++ b/glom/libglom/data_structure/glomconversions.cc
@@ -304,7 +304,7 @@ Glib::ustring Conversions::format_tm(const tm& tm_data, const std::locale& local
 
   do
   {
-    const Glib::ScopedPtr<char> buf (static_cast<char*>(g_malloc(bufsize)));
+    const auto buf = Glib::make_unique_ptr_gfree(static_cast<char*>(g_malloc(bufsize)));
 
     // Set the first byte to something other than '\0', to be able to
     // recognize whether strftime actually failed or just returned "".
diff --git a/glom/libglom/utils.cc b/glom/libglom/utils.cc
index 1102c1e..d472f8e 100644
--- a/glom/libglom/utils.cc
+++ b/glom/libglom/utils.cc
@@ -1064,7 +1064,7 @@ std::string Utils::sqlbuilder_get_full_query(
   }
 
   //Convert to something that std::cout should be able to handle.
-  const Glib::ScopedPtr<char> buf(g_convert_with_fallback(
+  const auto buf = Glib::make_unique_ptr_gfree(g_convert_with_fallback(
     result.raw().data(), result.raw().size(),
     "ISO-8859-1", "UTF-8",
     (char*)"?",