fix prototype

Former-commit-id: 24ecf97c5936d71d4f81cada69c7651d8a6d21bd

include/igl/facet_components.cpp

@@ -13,7 +13,8 @@ IGL_INLINE void igl::facet_components(
   vector<vector<vector<Index > > > TT;
   vector<vector<vector<Index > > > TTi;
   triangle_triangle_adjacency(F,TT,TTi);
-  return facet_components(TT,C);
+  Eigen::VectorXi counts;
+  return facet_components(TT,C,counts);
 }
 
 template <
@@ -68,9 +69,9 @@ IGL_INLINE void igl::facet_components(
     }
     id++;
   }
-  assert(id == vcounts.size());
+  assert((size_t) id == vcounts.size());
   const size_t ncc = vcounts.size();
-  assert(C.maxCoeff()+1 == ncc);
+  assert((size_t)C.maxCoeff()+1 == ncc);
   counts.resize(ncc,1);
   for(size_t i = 0;i<ncc;i++)
   {