[gjs/gnome-40: 2/30] fundamental: Use g_value_type_compatible to check if we can do type conversion

[Philip Chimento <pchimento src gnome org>]

commit 74ba0988b4644bef930829decc5128cdd57ccb20
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Thu Apr 8 17:07:55 2021 +0200

    fundamental: Use g_value_type_compatible to check if we can do type conversion
    
    While it's quite similar to what we did already, it adds a further layer
    of protection, by ensuring that the GValue can hold both types.
    
    Since that's what we eventually care.
    
    (cherry-picked from commit b49a465b)

 gi/fundamental.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gi/fundamental.cpp b/gi/fundamental.cpp
index 0e83028c..e443dc7a 100644
--- a/gi/fundamental.cpp
+++ b/gi/fundamental.cpp
@@ -464,7 +464,7 @@ bool FundamentalBase::to_gvalue(JSContext* cx, JS::HandleObject obj,
 
     auto* instance = priv->to_instance();
     if (!instance->set_value(gvalue)) {
-        if (g_type_is_a(instance->gtype(), G_VALUE_TYPE(gvalue))) {
+        if (g_value_type_compatible(instance->gtype(), G_VALUE_TYPE(gvalue))) {
             g_value_set_instance(gvalue, instance->m_ptr);
             return true;
         }