[gnome-builder] buffers: fix -Wsign-compare warnings

[Christian Hergert <chergert src gnome org>]

commit 8086bfa86c7ed01205af30cd9eca043479629d0a
Author: Christian Hergert <chergert redhat com>
Date:   Tue Feb 28 12:05:00 2017 -0800

    buffers: fix -Wsign-compare warnings

 libide/buffers/ide-buffer-manager.c |    3 +--
 libide/buffers/ide-buffer.c         |    2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/libide/buffers/ide-buffer-manager.c b/libide/buffers/ide-buffer-manager.c
index eeeaf7c..6a21815 100644
--- a/libide/buffers/ide-buffer-manager.c
+++ b/libide/buffers/ide-buffer-manager.c
@@ -412,14 +412,13 @@ ide_buffer_manager_remove_buffer (IdeBufferManager *self,
   IdeFile *file;
   GFile *gfile;
   gint position = -1;
-  gint i;
 
   IDE_ENTRY;
 
   g_return_if_fail (IDE_IS_BUFFER_MANAGER (self));
   g_return_if_fail (IDE_IS_BUFFER (buffer));
 
-  for (i = 0; i < self->buffers->len; i++)
+  for (guint i = 0; i < self->buffers->len; i++)
     {
       if ((gpointer)buffer == g_ptr_array_index (self->buffers, i))
         {
diff --git a/libide/buffers/ide-buffer.c b/libide/buffers/ide-buffer.c
index 7131e76..677f616 100644
--- a/libide/buffers/ide-buffer.c
+++ b/libide/buffers/ide-buffer.c
@@ -1874,7 +1874,7 @@ ide_buffer_get_diagnostic_at_iter (IdeBuffer         *self,
 
           ide_buffer_get_iter_at_location (self, &pos, location);
 
-          if (line == gtk_text_iter_get_line (&pos))
+          if (line == (guint)gtk_text_iter_get_line (&pos))
             {
               guint offset;