std::bad_alloc in anms.h

[drondao]

In "anms.h", the following line assigns c = 0 when width = 1 because of integer division:

double c = width/2; //initializing Grid

This causes the assignment of infinity to

int numCellCols = floor(cols/c);
int numCellRows = floor(rows/c);

which, in turn, returns an std::bad_alloc exception because of the call

std::vector<std::vector<bool> > coveredVec(numCellRows+1,std::vector<bool>(numCellCols+1,false));

[BAILOOL]

@drondao Thank you for pointing it out. Feel free to commit changes through the pull request.