Issue #3080: Fix call to case_ok() in find_init_module()
diff --git a/Python/import.c b/Python/import.c
index 0194d89..38960b1 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -2237,8 +2237,8 @@
     if (filename == NULL)
         return -1;
     if (_Py_stat(filename, &statbuf) == 0) {
-        /* 9=len("/__init__") */
-        match = case_ok(filename, 9, initstr);
+        /* 3=len(".py") */
+        match = case_ok(filename, -3, initstr);
         if (match < 0) {
             Py_DECREF(filename);
             return -1;
@@ -2255,8 +2255,8 @@
     if (filename == NULL)
         return -1;
     if (_Py_stat(filename, &statbuf) == 0) {
-        /* 9=len("/__init__") */
-        match = case_ok(filename, 9, initstr);
+        /* 4=len(".pyc") */
+        match = case_ok(filename, -4, initstr);
         if (match < 0) {
             Py_DECREF(filename);
             return -1;