[latexila] Fix wrong uses of return_if_fail/return_val_if_fail

[SÃbastien Wilmet <swilmet src gnome org>]

commit 50e39860e13f6dbb3146eb97cb714cf1e88e1ced
Author: SÃbastien Wilmet <swilmet gnome org>
Date:   Mon Aug 27 11:57:49 2012 +0200

    Fix wrong uses of return_if_fail/return_val_if_fail
    
    Now latexila can be built with clang.

 src/clean_build_files.vala |    2 +-
 src/projects.vala          |    2 +-
 src/templates_dialogs.vala |    2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/clean_build_files.vala b/src/clean_build_files.vala
index 6e42fca..3796389 100644
--- a/src/clean_build_files.vala
+++ b/src/clean_build_files.vala
@@ -166,7 +166,7 @@ public class CleanBuildFiles : GLib.Object
 
     private void confirm_cleanup (Gee.ArrayList<File> files_to_delete, File directory)
     {
-        return_val_if_fail (0 < files_to_delete.size, false);
+        return_if_fail (0 < files_to_delete.size);
 
         TreeView list_files = get_list_files (files_to_delete, directory);
         Dialog dialog = get_dialog (list_files);
diff --git a/src/projects.vala b/src/projects.vala
index 190c0a7..2d61759 100644
--- a/src/projects.vala
+++ b/src/projects.vala
@@ -129,7 +129,7 @@ public class Projects
         if (new_main_file.equal (project.main_file))
             return false;
 
-        return_if_fail (new_main_file.has_prefix (project.directory));
+        return_val_if_fail (new_main_file.has_prefix (project.directory), false);
 
         project.main_file = new_main_file;
         projects[num] = project;
diff --git a/src/templates_dialogs.vala b/src/templates_dialogs.vala
index c15712e..7b35f7e 100644
--- a/src/templates_dialogs.vala
+++ b/src/templates_dialogs.vala
@@ -168,7 +168,7 @@ public class CreateTemplateDialog : Dialog
 {
     public CreateTemplateDialog (MainWindow parent)
     {
-        return_if_fail (parent.active_tab != null);
+        return_val_if_fail (parent.active_tab != null, null);
 
         title = _("New Template...");
         set_transient_for (parent);