Core/MMAPS: Fix invisible wall issue in MMAPS.

Fix invisible wall issues in MMAPS caused by tile connections not being extracted correctly.
This reverts aa645683b8 and restores an old version of recastnavigation, most likely https://github.com/memononen/recastnavigation/commit/1be9de72d87dcfdecf6bea30f5461745f7d7afe6 .

Re-extracting MMAPS is required.

src/tools/mmaps_generator/MapBuilder.cpp

@@ -36,7 +36,7 @@ namespace DisableMgr
 }
 
 #define MMAP_MAGIC 0x4d4d4150   // 'MMAP'
-#define MMAP_VERSION 4
+#define MMAP_VERSION 3
 
 struct MmapTileHeader
 {
@@ -701,6 +701,14 @@ namespace MMAP
         delete[] dmmerge;
         delete[] tiles;
 
+        // remove padding for extraction
+        for (int i = 0; i < iv.polyMesh->nverts; ++i)
+        {
+            unsigned short* v = &iv.polyMesh->verts[i * 3];
+            v[0] -= (unsigned short)config.borderSize;
+            v[2] -= (unsigned short)config.borderSize;
+        }
+
         // set polygons as walkable
         // TODO: special flags for DYNAMIC polygons, ie surfaces that can be turned on and off
         for (int i = 0; i < iv.polyMesh->npolys; ++i)
@@ -739,8 +747,9 @@ namespace MMAP
         rcVcopy(params.bmax, bmax);
         params.cs = config.cs;
         params.ch = config.ch;
-        params.tileLayer = 0;
-        params.buildBvTree = true;
+        params.tileSize = VERTEX_PER_MAP;
+        /*params.tileLayer = 0;
+        params.buildBvTree = true;*/
 
         // will hold final navmesh
         unsigned char* navData = NULL;