SF #1444030: Fix several potential defects found by Coverity.
(reviewed by Neal Norwitz)
diff --git a/Modules/zipimport.c b/Modules/zipimport.c
index fa4380c..637dc48 100644
--- a/Modules/zipimport.c
+++ b/Modules/zipimport.c
@@ -1167,6 +1167,8 @@
 
 	mod = Py_InitModule4("zipimport", NULL, zipimport_doc,
 			     NULL, PYTHON_API_VERSION);
+	if (mod == NULL)
+		return;
 
 	ZipImportError = PyErr_NewException("zipimport.ZipImportError",
 					    PyExc_ImportError, NULL);