Clarify the scope of a comment.

Change-Id: Ie9836267ac2bca4b4f5509f0f2def288e7b8c9ab
Reviewed-on: https://code-review.googlesource.com/c/37955
Reviewed-by: Paul Wankadia <junyer@google.com>
diff --git a/kokoro/cmake.sh b/kokoro/cmake.sh
index f3db5bc..999fbfe 100755
--- a/kokoro/cmake.sh
+++ b/kokoro/cmake.sh
@@ -8,9 +8,9 @@
     CMAKE_G_A_FLAGS=('-G' 'Visual Studio 14 2015' '-A' 'x64')
     ;;
   *)
+    CMAKE_G_A_FLAGS=()
     # Work around a bug in older versions of bash. :/
     set +u
-    CMAKE_G_A_FLAGS=()
     ;;
 esac