Add null check for avoiding std::string crash

ewk_view_url_get() can return nullptr, but std::string constructor
with nullptr causes crash. so add null check before construction.

Change-Id: I76e32366a27d307e82778150d5235696f68f99a9
Signed-off-by: SangYong Park <sy302.park@samsung.com>

diff --git a/runtime/browser/web_view_impl.cc b/runtime/browser/web_view_impl.cc
index db7de49..0f209cd 100755 (executable)
--- a/runtime/browser/web_view_impl.cc
+++ b/runtime/browser/web_view_impl.cc
@@ -967,7 +967,8 @@ void WebViewImpl::InitRotaryEventCallback() {
 }
 
 std::string WebViewImpl::GetUrl() {
-  return std::string(ewk_view_url_get(ewk_view_));
+  auto url = ewk_view_url_get(ewk_view_);
+  return std::string(url ? url : "");
 }
 
 Evas_Object* WebViewImpl::evas_object() const {