using int/bool convention instead of new enum type

src/project.c

@@ -1232,7 +1232,7 @@ int setcontrol(EN_Project p, int type, int linkIndex, double setting,
     control->Setting = s;
     control->Time = t;
     control->Grade = lvl;
-    control->isEnabled = ENABLED;
+    control->isEnabled = TRUE;
     return 0;
 }