qbsp: don't generate portals on detail splits

Also, compile fix for incomplete commit da3aa26ee.

Signed-off-by: Kevin Shanahan <kmshanah@disenchant.net>

qbsp/portals.c

@@ -451,6 +451,10 @@ CutNodePortals_r(node_t *node)
     if (node->contents)
 	return;
 
+    /* No portals on detail separators */
+    if (node->detail_separator)
+	return;
+
     plane = &map.planes[node->planenum];
     front = node->children[0];
     back = node->children[1];

qbsp/qbsp.h

@@ -396,7 +396,7 @@ typedef struct surface_s {
     vec3_t mins, maxs;
     bool onnode;		// true if surface has already been used
 				//   as a splitting node
-    bool detail_separator;	// true if generated by a detail brush
+    bool detail_separator;	// true if split generated by a detail brush
     face_t *faces;		// links to all faces on either side of the surf
 } surface_t;