glib: Return a reference to the ValueArray pspec element spec

Less refcounting.

Author: sdroege

glib/src/param_spec.rs

@@ -1462,11 +1462,18 @@ impl ParamSpecValueArray {
 
     #[doc(alias = "get_element_spec")]
     #[inline]
-    pub fn element_spec(&self) -> Option<ParamSpec> {
+    pub fn element_spec(&self) -> Option<&ParamSpec> {
         unsafe {
             let ptr = ToGlibPtr::<*const gobject_ffi::GParamSpecValueArray>::to_glib_none(self).0;
 
-            from_glib_none((*ptr).element_spec)
+            if (*ptr).element_spec.is_null() {
+                None
+            } else {
+                Some(
+                    &*(&(*ptr).element_spec as *const *mut gobject_ffi::GParamSpec
+                        as *const ParamSpec),
+                )
+            }
         }
     }