avcodec/hap: Avoid unnecessary opt.h inclusion

It presumably exists because HapContext contains an AVClass*.
Yet AVClass is actually defined in log.h and even this inclusion
can be avoided by struct AVClass*. This avoids opt.h inclusions
in hap.c and hapdec.c.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

libavcodec/hap.h

@@ -23,10 +23,9 @@
 #ifndef AVCODEC_HAP_H
 #define AVCODEC_HAP_H
 
+#include <stddef.h>
 #include <stdint.h>
 
-#include "libavutil/opt.h"
-
 #include "bytestream.h"
 #include "texturedsp.h"
 
@@ -59,7 +58,7 @@ typedef struct HapChunk {
 } HapChunk;
 
 typedef struct HapContext {
-    AVClass *class;
+    const struct AVClass *class;
 
     GetByteContext gbc;
 

libavcodec/hapqa_extract_bsf.c

@@ -30,6 +30,8 @@
 #include "bytestream.h"
 #include "hap.h"
 
+#include "libavutil/opt.h"
+
 typedef struct HapqaExtractContext {
     const AVClass *class;
     int texture;/* index of the texture to keep (0 for rgb or 1 for alpha) */