Add tiny check around new mtime check code. Fixes certain compile time options.

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@4345 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

src/files.c

@@ -2028,12 +2028,14 @@ bool do_writeout(bool exiting)
 			    continue;
 		    }
 		}
+#ifndef NANO_TINY
 		if (openfile->current_stat && openfile->current_stat->st_mtime < st.st_mtime) {
 		    i = do_yesno_prompt(FALSE,
 			_("File was modified since you opened it, continue saving ? "));
 		    if (i == 0 || i == -1)
 			continue;
 		}
+#endif
 
 	    }