gh-133597: Fix memory leak if error occurred in _sys_getwindowsversion_from_kernel32 (GH-133598)

(cherry picked from commit 0ec8fc8)

Co-authored-by: Sergey Miryanov <[email protected]>

Author: miss-islington

Python/sysmodule.c

@@ -1670,6 +1670,9 @@ _sys_getwindowsversion_from_kernel32(void)
         !GetFileVersionInfoW(kernel32_path, 0, verblock_size, verblock) ||
         !VerQueryValueW(verblock, L"", (LPVOID)&ffi, &ffi_len)) {
         PyErr_SetFromWindowsErr(0);
+        if (verblock) {
+            PyMem_RawFree(verblock);
+        }
         return NULL;
     }