get_video_desc_from_string: fix 4k modes (3840 wide)

Author: MartinPulec

src/video.cpp

@@ -380,7 +380,7 @@ struct video_desc get_video_desc_from_string(const char *string)
                 ret.height = 1080;
         } else if (strncasecmp(string, "4k", 2) == 0 ||
                    STARTS_WITH(string, "2160p")) {
-                ret.width = 3860;
+                ret.width = 3840;
                 ret.height = 2160;
         } else if (strncasecmp(string, "4d", 2) == 0) {
                 ret.width = 4096;