Define AVERROR for ffmpeg 0.4.8 & 0.4.9-pre1 and add a missing motion_log()

ffmpeg.h

@@ -4,8 +4,23 @@
 #ifdef HAVE_FFMPEG
 #include <errno.h>
 #include <avformat.h>
+
+#ifndef AVERROR /* 0.4.8 & 0.4.9-pre1 */
+
+#if EINVAL > 0
+#define AVERROR(e) (-(e)) 
+#define AVUNERROR(e) (-(e)) 
+#else
+/* Some platforms have E* and errno already negated. */
+#define AVERROR(e) (e)
+#define AVUNERROR(e) (e)
 #endif
 
+#endif /* AVERROR */
+
+#endif /* HAVE_FFMPEG */
+
+
 #include <stdio.h>
 #include <stdarg.h>
 

video.c

@@ -177,6 +177,7 @@ unsigned char *v4l_start(struct context *cnt, struct video_dev *viddev, int widt
 		}
 
 		if (MAP_FAILED == map) {
+			motion_log(LOG_ERR,1,"MAP_FAILED");
 			return (NULL);
 		}
 		viddev->v4l_curbuffer=0;