screenshare: fix bug on certain wayland systems

Fixed logic error which was causing screen sharing to stop working on certain Wayland environments.

GitLab: #1676

Change-Id: Idf3beb97a53d2eb88e082cee710be56c90c6df05

src/libclient/api/call.h

@@ -168,8 +168,12 @@ struct Info
             if (media[MediaAttributeKey::MEDIA_TYPE] == Details::MEDIA_TYPE_VIDEO) {
                 if (media[MediaAttributeKey::SOURCE].startsWith(VideoProtocolPrefix::DISPLAY)
                     || media[MediaAttributeKey::SOURCE].startsWith(VideoProtocolPrefix::FILE)) {
-                    callInfo["is_sharing"] = true;
-                    callInfo["preview_id"] = media[MediaAttributeKey::SOURCE];
+                    if (media[MediaAttributeKey::MUTED] == TRUE_STR) {
+                        callInfo["is_sharing"] = false;
+                    } else {
+                        callInfo["is_sharing"] = true;
+                        callInfo["preview_id"] = media[MediaAttributeKey::SOURCE];
+                    }
                 }
                 if (media[MediaAttributeKey::ENABLED] == TRUE_STR
                     && media[MediaAttributeKey::MUTED] == FALSE_STR && previewId.isEmpty()) {