Bugfix: clear exception state in open_func and create_func

This is a small bugfix that clears the exception state after trying
(and failing) to read keep_cache and direct_io. Not doing this will
make the exception appear in a random other place.

This can easily happen in code that uses PyErr_Occured(), the code
being checked might have not triggered an exception, but
PyErr_Occured() will still find the getattr() exception that was
not handled here.

Author: moshevds

fuseparts/_fusemodule.c

@@ -529,11 +529,15 @@ open_func(const char *path, struct fuse_file_info *fi)
 	if (pytmp1) {
 		fi->keep_cache = PyObject_IsTrue(pytmp1);
 		Py_DECREF(pytmp1);
+	} else {
+		PyErr_Clear();
 	}
 	pytmp1 = PyObject_GetAttrString(pytmp, "direct_io");
 	if (pytmp1) {
 		fi->direct_io = PyObject_IsTrue(pytmp1);
 		Py_DECREF(pytmp1);
+	} else {
+		PyErr_Clear();
 	}
 
 	if (PyObject_IsTrue(PyTuple_GetItem(v, 1)))
@@ -573,11 +577,15 @@ create_func(const char *path, mode_t mode, struct fuse_file_info *fi)
 	if (pytmp1) {
 		fi->keep_cache = PyObject_IsTrue(pytmp1);
 		Py_DECREF(pytmp1);
+	} else {
+		PyErr_Clear();
 	}
 	pytmp1 = PyObject_GetAttrString(pytmp, "direct_io");
 	if (pytmp1) {
 		fi->direct_io = PyObject_IsTrue(pytmp1);
 		Py_DECREF(pytmp1);
+	} else {
+		PyErr_Clear();
 	}
 
 	if (PyObject_IsTrue(PyTuple_GetItem(v, 1))) {