Fix deadlock

Solves #79 (closed)

src/module/mpv.c

@@ -67,9 +67,9 @@ lmpv_prepare(volatile sqlite3 *db)
 int
 lmpv_observe_properties(mpv_handle *ctx)
 {
-    return (mpv_observe_property(ctx, 0, "ao-volume", MPV_FORMAT_INT64) >= 0)   &&
-           (mpv_observe_property(ctx, 0, "duration",  MPV_FORMAT_INT64) >= 0)   &&
-           (mpv_observe_property(ctx, 0, "time-pos",  MPV_FORMAT_INT64) >= 0)   &&
+    return (mpv_observe_property(ctx, 0, "ao-volume", MPV_FORMAT_INT64) >= 0) &&
+           (mpv_observe_property(ctx, 0, "duration",  MPV_FORMAT_INT64) >= 0) &&
+           (mpv_observe_property(ctx, 0, "time-pos",  MPV_FORMAT_INT64) >= 0) &&
            (mpv_observe_property(ctx, 0, "pause",     MPV_FORMAT_FLAG)  >= 0);
 }