[gnome-photos] tool-colors: Don't leak the GVariantType

[Debarshi Ray <debarshir src gnome org>]

commit 320e6b1e2e308e2db39312addbd1c8f90e044df9
Author: Debarshi Ray <debarshir gnome org>
Date:   Fri Feb 3 00:46:38 2017 +0100

    tool-colors: Don't leak the GVariantType

 src/photos-tool-colors.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/photos-tool-colors.c b/src/photos-tool-colors.c
index 92859d5..67898d6 100644
--- a/src/photos-tool-colors.c
+++ b/src/photos-tool-colors.c
@@ -90,6 +90,7 @@ photos_tool_colors_brightness_contrast_value_changed_timeout (gpointer user_data
   g_variant_builder_add (&parameter, "{sd}", "contrast", contrast_real);
   g_action_activate (self->brightness_contrast, g_variant_builder_end (&parameter));
 
+  g_variant_type_free (parameter_type);
   self->brightness_contrast_value_changed_id = 0;
   return G_SOURCE_REMOVE;
 }