Core/Maps: Reduce the output map file size in the maps extractor for maps that do not have any hole information

Core/Mmaps: Fixed swimming creatures stuck in water. (Thanks Vlad and @Chevron )
Note: Re-extract maps

src/tools/map_extractor/System.cpp

@@ -276,7 +276,7 @@ void ReadLiquidTypeTableDBC()
 
 // Map file format data
 static char const* MAP_MAGIC         = "MAPS";
-static char const* MAP_VERSION_MAGIC = "v1.2";
+static char const* MAP_VERSION_MAGIC = "v1.3";
 static char const* MAP_AREA_MAGIC    = "AREA";
 static char const* MAP_HEIGHT_MAGIC  = "MHGT";
 static char const* MAP_LIQUID_MAGIC  = "MLIQ";
@@ -836,8 +836,8 @@ bool ConvertADT(char *filename, char *filename2, int /*cell_y*/, int /*cell_x*/,
     else
         map.holesOffset = map.heightMapOffset + map.heightMapSize;
 
-    map.holesSize = sizeof(holes);
     memset(holes, 0, map.holesSize);
+    bool hasHoles = false;
 
     for (int i = 0; i < ADT_CELLS_PER_GRID; ++i)
     {
@@ -847,12 +847,19 @@ bool ConvertADT(char *filename, char *filename2, int /*cell_y*/, int /*cell_x*/,
             if (!cell)
                 continue;
             holes[i][j] = cell->holes;
+            if (!hasHoles && cell->holes != 0)
+                hasHoles = true;
         }
     }
+    
+    if (hasHoles)
+        map.holesSize = sizeof(holes);
+    else
+        map.holesSize = 0;
 
     // Ok all data prepared - store it
-    FILE *output=fopen(filename2, "wb");
-    if(!output)
+    FILE* output = fopen(filename2, "wb");
+    if (!output)
     {
         printf("Can't create the output file '%s'\n", filename2);
         return false;
@@ -899,8 +906,10 @@ bool ConvertADT(char *filename, char *filename2, int /*cell_y*/, int /*cell_x*/,
                 fwrite(&liquid_height[y+liquidHeader.offsetY][liquidHeader.offsetX], sizeof(float), liquidHeader.width, output);
         }
     }
+
     // store hole data
-    fwrite(holes, map.holesSize, 1, output);
+    if (hasHoles)
+        fwrite(holes, map.holesSize, 1, output);
 
     fclose(output);