promote some shifts to unsigned, so as not to invoke undefined behavior
diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 151ce3c..ca609a9 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -2308,7 +2308,7 @@
stream as-is (giving a ZWNBSP character). */
if (bo == 0) {
if (size >= 4) {
- const Py_UCS4 bom = (q[iorder[3]] << 24) | (q[iorder[2]] << 16) |
+ const Py_UCS4 bom = ((unsigned int)q[iorder[3]] << 24) | (q[iorder[2]] << 16) |
(q[iorder[1]] << 8) | q[iorder[0]];
#ifdef BYTEORDER_IS_LITTLE_ENDIAN
if (bom == 0x0000FEFF) {
@@ -2378,7 +2378,7 @@
/* The remaining input chars are ignored if the callback
chooses to skip the input */
}
- ch = (q[iorder[3]] << 24) | (q[iorder[2]] << 16) |
+ ch = ((unsigned int)q[iorder[3]] << 24) | (q[iorder[2]] << 16) |
(q[iorder[1]] << 8) | q[iorder[0]];
if (ch >= 0x110000)