fix a crash when the size of a label is empty and '\t' is contained

2015-05-29 00:09:47 +08:00
parent d9444cb5be
commit 11d65763ce
2 changed files with 6 additions and 0 deletions
--- a/source/paint/detail/native_paint_interface.cpp
+++ b/source/paint/detail/native_paint_interface.cpp
@@ -156,6 +156,9 @@ namespace detail

 	nana::size text_extent_size(drawable_type dw, const nana::char_t * text, std::size_t len)
 	{
+		if (nullptr == dw || nullptr == text || 0 == len)
+			return{};
+
 		nana::size extents = raw_text_extent_size(dw, text, len);

 		const nana::char_t* const end = text + len;