Simplify get_byte and url_fgetc.

Originally committed as revision 24494 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/aviobuf.c

@@ -390,28 +390,22 @@ void init_checksum(ByteIOContext *s,
 /* XXX: put an inline version */
 int get_byte(ByteIOContext *s)
 {
-    if (s->buf_ptr < s->buf_end) {
-        return *s->buf_ptr++;
-    } else {
+    if (s->buf_ptr >= s->buf_end)
         fill_buffer(s);
         if (s->buf_ptr < s->buf_end)
             return *s->buf_ptr++;
         else
             return 0;
-    }
 }
 
 int url_fgetc(ByteIOContext *s)
 {
-    if (s->buf_ptr < s->buf_end) {
-        return *s->buf_ptr++;
-    } else {
+    if (s->buf_ptr >= s->buf_end)
         fill_buffer(s);
         if (s->buf_ptr < s->buf_end)
             return *s->buf_ptr++;
         else
             return URL_EOF;
-    }
 }
 
 int get_buffer(ByteIOContext *s, unsigned char *buf, int size)