Tools/mmaps_generator: Only initialize memory for inds mesh when it will be read (#29795)

* this change does NOT require re-generating mmaps

src/tools/mmaps_generator/MapBuilder.cpp

@@ -397,16 +397,15 @@ namespace MMAP
         }
 
         float* verts = new float[verticesCount];
-        int* inds = new int[indicesCount];
 
         if (fread(verts, sizeof(float), verticesCount, file) != verticesCount)
         {
             fclose(file);
             delete[] verts;
-            delete[] inds;
             return;
         }
 
+        int* inds = new int[indicesCount];
         if (fread(inds, sizeof(int), indicesCount, file) != indicesCount)
         {
             fclose(file);