[gjs: 8/10] function: Factor out repeated call to Argument::return_type()

[Philip Chimento <pchimento src gnome org>]

commit 0e0dc17077cdc2309c1a3a237e857a3121dd0eae
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Mon Oct 26 21:18:27 2020 +0100

    function: Factor out repeated call to Argument::return_type()

 gi/function.cpp | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)
---
diff --git a/gi/function.cpp b/gi/function.cpp
index effdc9bc0..f39dc1727 100644
--- a/gi/function.cpp
+++ b/gi/function.cpp
@@ -962,8 +962,9 @@ bool Function::invoke(JSContext* context, const JS::CallArgs& args,
     g_assert_cmpuint(ffi_arg_pos, ==, ffi_argc);
     g_assert_cmpuint(gi_arg_pos, ==, state.gi_argc);
 
-    return_value_p = get_return_ffi_pointer_from_giargument(
-        m_arguments.return_type(), &return_value);
+    GITypeInfo* return_type = m_arguments.return_type();
+    return_value_p =
+        get_return_ffi_pointer_from_giargument(return_type, &return_value);
     ffi_call(&m_invoker.cif, FFI_FN(m_invoker.native_address), return_value_p,
              ffi_arg_pointers.get());
 
@@ -973,9 +974,9 @@ bool Function::invoke(JSContext* context, const JS::CallArgs& args,
     if (!r_value)
         args.rval().setUndefined();
 
-    if (m_arguments.return_type()) {
-        gi_type_info_extract_ffi_return_value(
-            m_arguments.return_type(), &return_value, state.return_value());
+    if (return_type) {
+        gi_type_info_extract_ffi_return_value(return_type, &return_value,
+                                              state.return_value());
     }
 
     // Process out arguments and return values. This loop is skipped if we fail