[3.12] gh-105390: Add explicit type cast (GH-105466) (#105472)

Author: miss-islington

Python/Python-tokenize.c

@@ -85,7 +85,8 @@ _tokenizer_error(struct tok_state *tok)
             break;
         case E_EOF:
             PyErr_SetString(PyExc_SyntaxError, "unexpected EOF in multi-line statement");
-            PyErr_SyntaxLocationObject(tok->filename, tok->lineno, tok->inp - tok->buf < 0 ? 0 : tok->inp - tok->buf);
+            PyErr_SyntaxLocationObject(tok->filename, tok->lineno,
+                                       tok->inp - tok->buf < 0 ? 0 : (int)(tok->inp - tok->buf));
             return -1;
         case E_DEDENT:
             msg = "unindent does not match any outer indentation level";