mate-volume-control: reduce the scope of some variables

Fixes 'cppcheck' warnings:

[mate-volume-control/gvc-level-bar.c:572]: (style) The scope of the variable 'by' can be reduced.
[mate-volume-control/gvc-level-bar.c:611]: (style) The scope of the variable 'bx' can be reduced.

[mate-volume-control/gvc-mixer-dialog.c:379]: (style) The scope of the variable 'swtch' can be reduced.
[mate-volume-control/gvc-mixer-dialog.c:534]: (style) The scope of the variable 'swtch' can be reduced.
[mate-volume-control/gvc-mixer-dialog.c:1891]: (style) The scope of the variable 'closure' can be reduced.

[mate-volume-control/sound-theme-file-utils.c:47]: (style) The scope of the variable 'data_dir' can be reduced.

1 files changed, 4 insertions, 2 deletions

diff --git a/mate-volume-control/gvc-level-bar.c b/mate-volume-control/gvc-level-bar.c
index f75a884..820ebbf 100644
--- a/mate-volume-control/gvc-level-bar.c
+++ b/mate-volume-control/gvc-level-bar.c
@@ -569,9 +569,10 @@ gvc_level_bar_draw (GtkWidget *widget, cairo_t *cr)
 
         if (bar->priv->orientation == GTK_ORIENTATION_VERTICAL) {
                 int i;
-                int by;
 
                 for (i = 0; i < NUM_BOXES; i++) {
+                        int by;
+
                         by = i * bar->priv->layout.delta;
                         curved_rectangle (cr,
                                           bar->priv->layout.area.x + 0.5,
@@ -608,7 +609,6 @@ gvc_level_bar_draw (GtkWidget *widget, cairo_t *cr)
                 }
         } else {
                 int i;
-                int bx;
 
                 if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL) {
                         GtkAllocation allocation;
@@ -620,6 +620,8 @@ gvc_level_bar_draw (GtkWidget *widget, cairo_t *cr)
                 }
 
                 for (i = 0; i < NUM_BOXES; i++) {
+                        int bx;
+
                         bx = i * bar->priv->layout.delta;
                         curved_rectangle (cr,
                                           bx + 0.5,