libobs: Add output stop error for "no space left"

libobs/obs-defs.h

@@ -39,6 +39,7 @@
 #define OBS_OUTPUT_ERROR          -4
 #define OBS_OUTPUT_DISCONNECTED   -5
 #define OBS_OUTPUT_UNSUPPORTED    -6
+#define OBS_OUTPUT_NO_SPACE       -7
 
 #define OBS_VIDEO_SUCCESS           0
 #define OBS_VIDEO_FAIL             -1