[Patch] More redundant NULL pointer checks

[Benjamin Kosnik]

Ok, except the sgetc change, don't do this. Also, your line breaks are funny:

+      const bool __testeof =
+	traits_type::eq_int_type(__c, traits_type::eof());

Should be:

+      const bool __testeof = traits_type::eq_int_type(__c, 
+	                                               traits_type::eof());


-benjamin