cmake: correctly report Vulkan support at configure time (thanks, Tiago!). Fixes Bugzilla #4262.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index bd0ac63..1a7fe19 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1544,6 +1544,7 @@ endif()
if(VIDEO_VULKAN)
set(SDL_VIDEO_VULKAN 1)
+ set(HAVE_VIDEO_VULKAN TRUE)
endif()
# Dummies