build: Don't try to detect vulkan library if the header wasn't found.

We've already failed. No need to fail again.

diff --git a/configure.ac b/configure.ac
index b0d37674bf7c5c0d8423fb38cfddf75ff430b73d..59886962f380a638ef8f7ae9091325f7e6273929 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1323,8 +1323,9 @@ fi
 
 if test "x$enable_vulkan" != "xno"; then
       vulkan_error=""
-      AC_CHECK_HEADER([vulkan/vulkan.h], [], [vulkan_error="Vulkan header not found"])
-      AC_CHECK_LIB([vulkan], [vkCreateInstance], [], [vulkan_error="Vulkan library not found"])
+      AC_CHECK_HEADER([vulkan/vulkan.h],
+          [AC_CHECK_LIB([vulkan], [vkCreateInstance], [], [vulkan_error="Vulkan library not found"])],
+          [vulkan_error="Vulkan header not found"])
       if test "x$vulkan_error" != "x"; then
           if "x$enable_vulkan" = "xyes"; then
               AC_MSG_ERROR($vulkan_error)