Replace path for include deadbeef.h to deadbeef/deadbeef.h

[3ed]

--- a/rating.c	2019-06-06 15:56:03.000000000 +0200
+++ b/rating.c	2020-05-28 17:48:35.171091539 +0200
@@ -1,4 +1,4 @@
-#include <deadbeef.h>
+#include <deadbeef/deadbeef.h>
 #include <string.h>
 #include <stdlib.h>

After this change you can omit -I/usr/include/deadbeef for gcc args because path to /usr/include/deadbeef.h become /usr/include/deadbeef/deadbeef.h. /usr/include/ is a default search localization.

Patch