patch 9.1.1500: if_python: typo in python error variable

Problem:  if_python: typo in python error variable
Solution: fix typo (Damien Lejay)

closes: #17640

Signed-off-by: Damien Lejay <damien@lejay.be>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/if_python.c b/src/if_python.c
index aa496f2..012a3e7 100644
--- a/src/if_python.c
+++ b/src/if_python.c
@@ -958,7 +958,7 @@
 	site = PyImport_ImportModule("site");
 	if (site == NULL)
 	{
-	    emsg(_(e_sorry_this_command_is_disabled_python_side_module_could_not_be_loaded));
+	    emsg(_(e_sorry_this_command_is_disabled_python_site_module_could_not_be_loaded));
 	    goto fail;
 	}
 	Py_DECREF(site);