[vala] codegen: fix generating struct equal function

[Luca Bruno <lucabru src gnome org>]

commit 207e696f08247510c12ef671344bf5af026559ea
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Jun 21 12:23:02 2015 +0200

    codegen: fix generating struct equal function
    
    Fixes bug 749952

 codegen/valaccodebasemodule.vala |    8 ++++----
 tests/Makefile.am                |    1 +
 tests/structs/bug749952.vala     |   14 ++++++++++++++
 3 files changed, 19 insertions(+), 4 deletions(-)
---
diff --git a/codegen/valaccodebasemodule.vala b/codegen/valaccodebasemodule.vala
index e1c6a63..78e52dc 100644
--- a/codegen/valaccodebasemodule.vala
+++ b/codegen/valaccodebasemodule.vala
@@ -2736,6 +2736,10 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
        }
 
        private string generate_struct_equal_function (Struct st) {
+               if (st.base_struct != null) {
+                       return generate_struct_equal_function (st.base_struct);
+               }
+
                string equal_func = "_%sequal".printf (get_ccode_lower_case_prefix (st));
 
                if (!add_wrapper (equal_func)) {
@@ -2743,10 +2747,6 @@ public abstract class Vala.CCodeBaseModule : CodeGenerator {
                        return equal_func;
                }
 
-               if (st.base_struct != null) {
-                       return generate_struct_equal_function (st.base_struct);
-               }
-
                var function = new CCodeFunction (equal_func, "gboolean");
                function.modifiers = CCodeModifiers.STATIC;
 
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 32026c8..343da51 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -112,6 +112,7 @@ TESTS = \
        structs/bug685177.vala \
        structs/bug686190.vala \
        structs/bug690380.vala \
+       structs/bug749952.vala \
        delegates/delegates.vala \
        delegates/bug539166.vala \
        delegates/bug595610.vala \
diff --git a/tests/structs/bug749952.vala b/tests/structs/bug749952.vala
new file mode 100644
index 0000000..212edc5
--- /dev/null
+++ b/tests/structs/bug749952.vala
@@ -0,0 +1,14 @@
+struct Foo {
+       int i;
+}
+
+struct Bar : Foo {
+}
+
+void main () {
+       Bar b1 = {};
+       Bar b2 = {};
+
+       assert (b1 == b2);
+       assert (b2 == b1);
+}