patch 8.2.3232: system() does not work without a second argument

Problem:    system() does not work without a second argument.
Solution:   Do not require a second argument. (Yegappan Lakshmanan,
            closes #8651, closes #8650)
diff --git a/src/version.c b/src/version.c
index e6491db..85b8ae9 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3232,
+/**/
     3231,
 /**/
     3230,