Dont use metadata on macOS too, for now, needs libjackserver fix

Signed-off-by: falkTX <falktx@falktx.com>

src/effects.c

@@ -51,13 +51,17 @@ typedef unsigned int uint;
 #define dlclose(lib)         FreeLibrary((HMODULE)lib)
 #define setenv(...)
 #define unsetenv(...)
-// FIXME implement these on jackserver side
-#define jack_get_property(c,p,v,t) true
-#define jack_set_property(...)
 #else
 #include <dlfcn.h>
 #endif
 
+#if defined(__APPLE__) || defined(_WIN32)
+// FIXME implement these on jackserver side
+static int jack_get_property_not(void) { return -1; }
+#define jack_get_property(c,p,v,t) jack_get_property_not()
+#define jack_set_property(...)
+#endif
+
 /* Jack */
 #include <jack/jack.h>
 #include <jack/intclient.h>