Store a copy of sectors, lines and sides in memory so that P_NetArchiveWorld()...

Store a copy of sectors, lines and sides in memory so that P_NetArchiveWorld() can soon use them instead of relying on re-opening the original lumps.
Fix print type issue.

src/p_setup.c

@@ -103,6 +103,9 @@ node_t *nodes;
 line_t *lines;
 side_t *sides;
 mapthing_t *mapthings;
+sector_t *spawnsectors;
+line_t *spawnlines;
+side_t *spawnsides;
 INT32 numstarposts;
 UINT16 bossdisabled;
 boolean stoppedclock;
@@ -2775,6 +2778,15 @@ boolean P_SetupLevel(boolean skipprecip)
 		P_LoadLineDefs2();
 		P_GroupLines();
 
+		// Copy relevant map data for NetArchive purposes.
+		spawnsectors = Z_Calloc(numsectors * sizeof (*sectors), PU_LEVEL, NULL);
+		spawnlines = Z_Calloc(numlines * sizeof (*lines), PU_LEVEL, NULL);
+		spawnsides = Z_Calloc(numsides * sizeof (*sides), PU_LEVEL, NULL);
+
+		memcpy(spawnsectors, sectors, numsectors * sizeof (*sectors));
+		memcpy(spawnlines, lines, numlines * sizeof (*lines));
+		memcpy(spawnsides, sides, numsides * sizeof (*sides));
+
 		P_PrepareRawThings(vres_Find(virt, "THINGS")->data);
 
 		P_MakeMapMD5(virt, &mapmd5);

src/r_state.h

@@ -63,6 +63,7 @@ extern seg_t *segs;
 
 extern size_t numsectors;
 extern sector_t *sectors;
+extern sector_t *spawnsectors;
 
 extern size_t numsubsectors;
 extern subsector_t *subsectors;
@@ -72,9 +73,11 @@ extern node_t *nodes;
 
 extern size_t numlines;
 extern line_t *lines;
+extern line_t *spawnlines;
 
 extern size_t numsides;
 extern side_t *sides;
+extern side_t *spawnsides;
 
 //
 // POV data.