avformat: Don't anonymously typedef structs

libavformat/r3d.c

@@ -25,13 +25,13 @@
 #include "avformat.h"
 #include "internal.h"
 
-typedef struct {
+typedef struct R3DContext {
     unsigned video_offsets_count;
     unsigned *video_offsets;
     unsigned rdvo_offset;
 } R3DContext;
 
-typedef struct {
+typedef struct Atom {
     unsigned size;
     uint32_t tag;
     uint64_t offset;