[gimp/wip/schumaml/crossraods-optimization] gitlab-ci: try a i386 debian image for the win32 build

[Michael Schumacher <schumaml src gnome org>]

commit 79c6538adecda8c4f258e99c89f361db0865d0b0
Author: Michael Schumacher <schumaml gmx de>
Date:   Mon Dec 7 21:45:00 2020 +0100

    gitlab-ci: try a i386 debian image for the win32 build

 build/docker/CI/Dockerfile.win32 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/build/docker/CI/Dockerfile.win32 b/build/docker/CI/Dockerfile.win32
index 929e8f571d..fe0599709d 100644
--- a/build/docker/CI/Dockerfile.win32
+++ b/build/docker/CI/Dockerfile.win32
@@ -1,4 +1,4 @@
-FROM debian:testing
+FROM i386/debian:testing
 ARG XDG_DATA_HOME
 
 # always run apt-get update and apt-get install in the same cachable layer