[3.6] bpo-30650: Fixed a syntax error: missed right parentheses (GH-2154) (#2215)

(cherry picked from commit 0d32218)
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index f4bbc89..0a9123b 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -12756,7 +12756,7 @@
     if (PyModule_AddIntMacro(m, SCHED_RR)) return -1;
 #endif
 #ifdef SCHED_SPORADIC
-    if (PyModule_AddIntMacro(m, SCHED_SPORADIC) return -1;
+    if (PyModule_AddIntMacro(m, SCHED_SPORADIC)) return -1;
 #endif
 #ifdef SCHED_BATCH
     if (PyModule_AddIntMacro(m, SCHED_BATCH)) return -1;