Use PyC_ParseBool to parse bools

This could cause problems since they could be any int,
then passed directly to internal functions that assume bools.

source/blender/python/intern/bpy_operator.c

@@ -45,6 +45,7 @@
 #include "bpy_rna.h" /* for setting arg props only - pyrna_py_to_prop() */
 #include "bpy_util.h"
 #include "../generic/bpy_internal_import.h"
+#include "../generic/py_capi_utils.h"
 #include "../generic/python_utildefines.h"
 
 #include "RNA_access.h"
@@ -311,8 +312,8 @@ static PyObject *pyop_as_string(PyObject *UNUSED(self), PyObject *args)
 
 	const char *opname;
 	PyObject *kw = NULL; /* optional args */
-	int all_args = 1;
-	int macro_args = 1;
+	bool all_args = true;
+	bool macro_args = true;
 	int error_val = 0;
 
 	char *buf = NULL;
@@ -325,8 +326,14 @@ static PyObject *pyop_as_string(PyObject *UNUSED(self), PyObject *args)
 		return NULL;
 	}
 	
-	if (!PyArg_ParseTuple(args, "s|O!ii:_bpy.ops.as_string", &opname, &PyDict_Type, &kw, &all_args, &macro_args))
+	if (!PyArg_ParseTuple(
+	        args, "s|O!O&O&:_bpy.ops.as_string",
+	        &opname, &PyDict_Type, &kw,
+	        PyC_ParseBool, &all_args,
+	        PyC_ParseBool, &macro_args))
+	{
 		return NULL;
+	}
 
 	ot = WM_operatortype_find(opname, true);