patch 8.2.0526: Gcc 9 complains about empty statement

Problem:    Gcc 9 complains about empty statement.
Solution:   Add {}. (Dominique Pelle, closes #5894)
diff --git a/src/version.c b/src/version.c
index 40f5b14..bcf333b 100644
--- a/src/version.c
+++ b/src/version.c
@@ -739,6 +739,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    526,
+/**/
     525,
 /**/
     524,