Compilation with gcc7

[Maxim Kuzmin]

The same bug as here ros-planning/navigation@65261a8

navigation_2d/nav2d_localizer/src/map/map_cspace.cpp

Lines 89 to 100 in 711a560

 void enqueue(map_t* map, unsigned int i, unsigned int j,  
 	     unsigned int src_i, unsigned int src_j, 
 	     std::priority_queue<CellData>& Q, 
 	     CachedDistanceMap* cdm, 
 	     unsigned char* marked) 
 { 
   if(marked[MAP_INDEX(map, i, j)]) 
     return; 
  
   unsigned int di = abs(i - src_i); 
   unsigned int dj = abs(j - src_j); 
   double distance = cdm->distances_[di][dj]; 

[Sebastian Kasperski]

Copied the fix from navigation package to master.
beeae18
Please verify that it solves this issue and close it.

[Maxim Kuzmin]

Now it's ok