Change while-loop to for-loop to express for-each-frame.

* Assignments can't be used as expressions, therefore `while` loops
  should not be used as a `for-each` construct. Use `for`, instead.

1 files changed, 3 insertions, 2 deletions

diff --git a/toxav/video.c b/toxav/video.c
index 4f9d8c84..5a160d37 100644
--- a/toxav/video.c
+++ b/toxav/video.c
@@ -343,9 +343,10 @@ void vc_iterate(VCSession *vc)
 
     /* Play decoded images */
     vpx_codec_iter_t iter = nullptr;
-    vpx_image_t *dest = nullptr;
 
-    while ((dest = vpx_codec_get_frame(vc->decoder, &iter)) != nullptr) {
+    for (vpx_image_t *dest = vpx_codec_get_frame(vc->decoder, &iter);
+            dest != nullptr;
+            dest = vpx_codec_get_frame(vc->decoder, &iter)) {
         if (vc->vcb) {
             vc->vcb(vc->av, vc->friend_number, dest->d_w, dest->d_h,
                     (const uint8_t *)dest->planes[0], (const uint8_t *)dest->planes[1], (const uint8_t *)dest->planes[2],