remove warning

diff --git a/time_dependent_navier_stokes/time_dependent_navier_stokes.cc b/time_dependent_navier_stokes/time_dependent_navier_stokes.cc
index ac9b0157d1fba8041cb953c332b53018fd290da9..ea012ca574598c1d0787048485d8120e6126236d 100644 (file)
--- a/time_dependent_navier_stokes/time_dependent_navier_stokes.cc
+++ b/time_dependent_navier_stokes/time_dependent_navier_stokes.cc
@@ -296,13 +296,13 @@ namespace fluid
 
   bool Time::time_to_output() const
   {
-    unsigned int delta = output_interval / delta_t;
+    unsigned int delta = static_cast<unsigned int>(output_interval / delta_t);
     return (timestep >= delta && timestep % delta == 0);
   }
 
   bool Time::time_to_refine() const
   {
-    unsigned int delta = refinement_interval / delta_t;
+    unsigned int delta = static_cast<unsigned int>(refinement_interval / delta_t);
     return (timestep >= delta && timestep % delta == 0);
   }