Get the definition for SDL_PropertiesID in SDL_thread.h

include/SDL3/SDL_thread.h

@@ -30,6 +30,7 @@
 
 #include <SDL3/SDL_stdinc.h>
 #include <SDL3/SDL_error.h>
+#include <SDL3/SDL_properties.h>
 
 /* Thread synchronization primitives */
 #include <SDL3/SDL_atomic.h>