- initialize portals with all other static line specials instead of doing it separately in P_FinishLoadingLineDefs when the map isn't fully set up yet.

- replace all float use in portal.cpp with doubles.

src/p_spec.cpp

@@ -64,6 +64,7 @@
 #include "a_keys.h"
 #include "c_dispatch.h"
 #include "r_sky.h"
+#include "portal.h"
 
 // State.
 #include "r_state.h"
@@ -1428,6 +1429,10 @@ void P_SpawnSpecials (void)
 			}
 			break;
 
+		case Line_SetPortal:
+			P_SpawnLinePortal(&lines[i]);
+			break;
+
 		// [RH] ZDoom Static_Init settings
 		case Static_Init:
 			switch (lines[i].args[1])