codegen: Include required type-definition when casting from generic pointer

Fixes https://gitlab.gnome.org/GNOME/vala/issues/828

diff --git a/codegen/valaccodebasemodule.vala b/codegen/valaccodebasemodule.vala
index 282c49378eb8d03a0cd9adc1e1eeaf570f0b28d7..5647f5ce9d9745af5bda67e5fd974c0130958610 100644 (file)
--- a/codegen/valaccodebasemodule.vala
+++ b/codegen/valaccodebasemodule.vala
@@ -5761,6 +5761,7 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
        public CCodeExpression convert_from_generic_pointer (CCodeExpression cexpr, DataType actual_type) {
                var result = cexpr;
                if (is_reference_type_argument (actual_type) || is_nullable_value_type_argument (actual_type)) {
+                       generate_type_declaration (actual_type, cfile);
                        result = new CCodeCastExpression (cexpr, get_ccode_name (actual_type));
                } else if (is_signed_integer_type_argument (actual_type)) {
                        result = new CCodeCastExpression (new CCodeCastExpression (cexpr, "gintptr"), get_ccode_name (actual_type));