Move check_marker() from get_bits to mpeg4videodec

MPEG-4 is the only decoder which uses check_marker().
Signed-off-by: Anton Khirnov <anton@khirnov.net>

libavcodec/get_bits.h

@@ -364,15 +364,6 @@ static inline unsigned int show_bits_long(GetBitContext *s, int n)
     }
 }
 
-static inline int check_marker(GetBitContext *s, const char *msg)
-{
-    int bit = get_bits1(s);
-    if (!bit)
-        av_log(NULL, AV_LOG_INFO, "Marker bit missing %s\n", msg);
-
-    return bit;
-}
-
 /**
  * Initialize GetBitContext.
  * @param buffer bitstream buffer, must be AV_INPUT_BUFFER_PADDING_SIZE bytes

libavcodec/mpeg4videodec.c

@@ -51,6 +51,15 @@ static const int mb_type_b_map[4] = {
     MB_TYPE_L0      | MB_TYPE_16x16,
 };
 
+static inline int check_marker(GetBitContext *s, const char *msg)
+{
+    int bit = get_bits1(s);
+    if (!bit)
+        av_log(NULL, AV_LOG_INFO, "Marker bit missing %s\n", msg);
+
+    return bit;
+}
+
 /**
  * Predict the ac.
  * @param n block index (0-3 are luma, 4-5 are chroma)