stream_cdf: added find_leadtime()

src/stream_cdf.c

@@ -6985,6 +6985,14 @@ int find_leadtime(int nvars, ncvar_t *ncvars)
 
   for ( ncvarid = 0; ncvarid < nvars; ncvarid++ )
     {
+      if ( ncvars[ncvarid].stdname[0] )
+        {
+          if ( strcmp(ncvars[ncvarid].stdname, "forecast_period") == 0 )
+            {
+              leadtime_id = ncvarid;
+              break;
+            }
+        }
     }
 
   return (leadtime_id);