Update str_ops.c

Author: BobTheBuidler

mypyc/lib-rt/str_ops.c

@@ -518,7 +518,21 @@ Py_ssize_t CPyStr_Count(PyObject *unicode, PyObject *substring, CPyTagged start)
         return NULL;
     }
     Py_ssize_t end = PyUnicode_GET_LENGTH(unicode);
-    return PyUnicode_Count(unicode, substring, start, end);
+    return PyUnicode_Count(unicode, substring, temp_start, end);
+}
+
+Py_ssize_t CPyStr_CountFull(PyObject *unicode, PyObject *substring, CPyTagged start, CPyTagged end) {
+    Py_ssize_t temp_start = CPyTagged_AsSsize_t(start);
+    if (temp_start == -1 && PyErr_Occurred()) {
+        PyErr_SetString(PyExc_OverflowError, CPYTHON_LARGE_INT_ERRMSG);
+        return NULL;
+    }
+    Py_ssize_t temp_end = CPyTagged_AsSsize_t(end);
+    if (temp_end == -1 && PyErr_Occurred()) {
+        PyErr_SetString(PyExc_OverflowError, CPYTHON_LARGE_INT_ERRMSG);
+        return NULL;
+    }
+    return PyUnicode_Count(unicode, substring, temp_start, temp_end);
 }