Added attribute to ignore refcount check in a function

Hacking a feature together in a ignore-refcount branch of cpychecker

psycopg/bytes_format.c

@@ -101,6 +101,7 @@ getnextarg(PyObject *args, Py_ssize_t arglen, Py_ssize_t *p_argidx)
 
 /* wrapper around _Bytes_Resize offering normal Python call semantics */
 
+IGNORE_REFCOUNT
 STEALS(1)
 Py_LOCAL_INLINE(PyObject *)
 resize_bytes(PyObject *b, Py_ssize_t newsize) {

psycopg/config.h

@@ -202,4 +202,11 @@ static double round(double num)
 #define RAISES
 #endif
 
+#if defined(WITH_CPYCHECKER_IGNORE_REFCOUNT_ATTRIBUTE)
+#define IGNORE_REFCOUNT \
+    __attribute__((cpychecker_ignore_refcount))
+#else
+#define IGNORE_REFCOUNT
+#endif
+
 #endif /* !defined(PSYCOPG_CONFIG_H) */