patch 8.0.1132: #if condition is not portable

Problem:    #if condition is not portable.
Solution:   Add defined(). (Zuloloxi, closes #2136)
diff --git a/src/version.c b/src/version.c
index 1ff5b3e..b90665e 100644
--- a/src/version.c
+++ b/src/version.c
@@ -762,6 +762,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1132,
+/**/
     1131,
 /**/
     1130,