Remove a couple of warnings turned up by "gcc -Wall".

Python/ceval.c

@@ -2856,8 +2856,9 @@ find_from_args(PyFrameObject *f, int nexti)
 		if (!name)
 			Py_DECREF(list);
 		else {
-			if (PyList_Append(list, name) < 0)
+			if (PyList_Append(list, name) < 0) {
 				Py_DECREF(list);
+			}
 			Py_DECREF(name);
 		}
 	} else {

Python/exceptions.c

@@ -793,7 +793,7 @@ SyntaxError__str__(PyObject *self, PyObject *args)
 	    buffer = PyMem_Malloc(bufsize);
 	    if (buffer != NULL) {
 		if (have_filename && have_lineno)
-		    sprintf(buffer, "%s (%s, line %d)",
+		    sprintf(buffer, "%s (%s, line %ld)",
 			    PyString_AS_STRING(str),
 			    my_basename(PyString_AS_STRING(filename)),
 			    PyInt_AsLong(lineno));
@@ -802,7 +802,7 @@ SyntaxError__str__(PyObject *self, PyObject *args)
 			    PyString_AS_STRING(str),
 			    my_basename(PyString_AS_STRING(filename)));
 		else if (have_lineno)
-		    sprintf(buffer, "%s (line %d)",
+		    sprintf(buffer, "%s (line %ld)",
 			    PyString_AS_STRING(str),
 			    PyInt_AsLong(lineno));