vgetargskeywords: Removed all PyErr_Clear() calls. It's possible that

this routine will report an error now when it didn't before, but, if so,
it's a legitimate error that should never have been suppressed.

Python/getargs.c

@@ -1097,6 +1097,8 @@ vgetargskeywords(PyObject *args, PyObject *keywords, char *format,
 					thiskw);
 				return 0;
 			}
+			else if (PyErr_Occurred())
+				return 0;
 		}
 	}
 
@@ -1107,9 +1109,10 @@ vgetargskeywords(PyObject *args, PyObject *keywords, char *format,
 		for (i = nargs; i < min; i++) {
 			if (PyDict_GetItemString(keywords, kwlist[i]))
 				len++;
+			else if (PyErr_Occurred())
+				return 0;
 		}
 	}
-	PyErr_Clear();	
 
 	/* make sure we got an acceptable number of arguments; the message
 	   is a little confusing with keywords since keyword arguments
@@ -1178,8 +1181,9 @@ vgetargskeywords(PyObject *args, PyObject *keywords, char *format,
 			}
 			converted++;
 		}
+		else if (PyErr_Occurred())
+			return 0;
 		else {
-			PyErr_Clear();
 			msg = skipitem(&format, p_va);
 			if (msg) {
 				seterror(i+1, msg, levels, fname, message);