gstreamer: new_from_g_date_time only returns NULL if arg is NULL

gstreamer/Gir.toml

@@ -1747,8 +1747,12 @@ status = "generate"
 
     [[object.function]]
     name = "new_from_g_date_time"
+        # Function only ever returns NULL if the argument is NULL
+        [[object.function.parameter]]
+        name = "dt"
+        nullable = false
         [object.function.return]
-        nullable_return_is_error = "Can't create DateTime from glib::DateTime"
+        nullable = false
 
     [[object.function]]
     name = "to_g_date_time"

gstreamer/src/date_time.rs

@@ -308,7 +308,7 @@ impl DateTime {
                     d.to_utc()
                         .ok_or_else(|| glib::glib_bool_error!("Can't convert datetime to UTC"))
                 })
-                .and_then(|d| DateTime::from_g_date_time(&d))
+                .map(|d| d.into())
         } else {
             // It would be cheaper to build a `glib::DateTime` direcly, unfortunetaly
             // this would require using `glib::TimeZone::new_offset` which is feature-gated
@@ -508,19 +508,15 @@ impl fmt::Display for DateTime {
     }
 }
 
-impl<'a> convert::TryFrom<&'a glib::DateTime> for DateTime {
-    type Error = glib::BoolError;
-
-    fn try_from(v: &'a glib::DateTime) -> Result<DateTime, glib::BoolError> {
+impl<'a> From<&'a glib::DateTime> for DateTime {
+    fn from(v: &'a glib::DateTime) -> DateTime {
         skip_assert_initialized!();
         DateTime::from_g_date_time(v)
     }
 }
 
-impl convert::TryFrom<glib::DateTime> for DateTime {
-    type Error = glib::BoolError;
-
-    fn try_from(v: glib::DateTime) -> Result<DateTime, glib::BoolError> {
+impl From<glib::DateTime> for DateTime {
+    fn from(v: glib::DateTime) -> DateTime {
         skip_assert_initialized!();
         DateTime::from_g_date_time(&v)
     }