Fix the library building in debug mode (#1144)

Closes #1143

---------

Co-authored-by: 🇺🇦 Sviatoslav Sydorenko (Святослав Сидоренко) <[email protected]>

Author: asvetlov

CHANGES/1144.bugfix.rst

@@ -0,0 +1 @@
+Fixed building the library in debug mode.

multidict/_multilib/state.h

@@ -65,7 +65,7 @@ PyType_GetModuleByDef(PyTypeObject *tp, PyModuleDef *def)
     assert(mro != NULL);
     assert(PyTuple_Check(mro));
     assert(PyTuple_GET_SIZE(mro) >= 1);
-    assert(PyTuple_GET_ITEM(mro, 0) == (PyObject *)type);
+    assert(PyTuple_GET_ITEM(mro, 0) == (PyObject *)tp);
 
     Py_ssize_t n = PyTuple_GET_SIZE(mro);
     for (Py_ssize_t i = 1; i < n; i++) {

setup.py

@@ -10,7 +10,7 @@
     NO_EXTENSIONS = True
 
 CFLAGS = ["-O3"]
-# CFLAGS = ["-O0", "-g3", "-DDEBUG"]
+# CFLAGS = ["-O0", "-g3", "-UNDEBUG"]
 if platform.system() != "Windows":
     CFLAGS.extend(
         [