If _stat_float_times is false, we will try to INCREF ival which could be NULL.
Return early in that case.  The caller checks for PyErr_Occurred so this
should be ok.

Klocwork #297
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index d968b6c..5c67be6 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -1121,6 +1121,8 @@
 #else
 	ival = PyInt_FromLong((long)sec);
 #endif
+	if (!ival)
+		return;
 	if (_stat_float_times) {
 		fval = PyFloat_FromDouble(sec + 1e-9*nsec);
 	} else {