[libgnome-volume-control/wip/muktupavels/warnings] mixer-control: fix -Wsign-compare warnings

[Alberts Muktupāvels <muktupavels src gnome org>]

commit d2bb0929edd803530de0cdeaf08bfdcfcc382b28
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Wed Dec 25 19:56:45 2019 +0200

    mixer-control: fix -Wsign-compare warnings

 gvc-mixer-control.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gvc-mixer-control.c b/gvc-mixer-control.c
index 04644d7..64924a1 100644
--- a/gvc-mixer-control.c
+++ b/gvc-mixer-control.c
@@ -2096,7 +2096,7 @@ create_ui_device_from_card (GvcMixerControl *control,
 #ifdef HAVE_ALSA
 typedef struct {
         char *port_name_to_set;
-        int headset_card;
+        uint32_t headset_card;
 } PortStatusData;
 
 static void
@@ -2124,7 +2124,7 @@ sink_info_cb (pa_context         *c,
 {
         PortStatusData *data = userdata;
         pa_operation *o;
-        int j;
+        unsigned int j;
         const char *s;
 
         if (eol != 0) {
@@ -2160,7 +2160,7 @@ source_info_cb (pa_context           *c,
 {
         PortStatusData *data = userdata;
         pa_operation *o;
-        int j;
+        unsigned int j;
         const char *s;
 
         if (eol != 0) {