trap possible cases where the option is type dates (manual cherry pick from...

trap possible cases where the option is type dates (manual cherry pick from commit 392ee4ae)

matlab/set_default_option.m

@@ -41,11 +41,11 @@ if isempty(options.(field))
     return
 end
 
-if ~iscell(options.(field))
+if ~iscell(options.(field)) && ~isdates(options.(field))
     if isnan(options.(field))
         options.(field) = default;
         return
     end
 end
 
-% 06/07/03 MJ added ; to eval expression
\ No newline at end of file
+% 06/07/03 MJ added ; to eval expression