fixed faulty var name..

Author: M2-TE

tests/CMakeLists.txt

@@ -15,7 +15,7 @@ add_test(NAME integration.add_subdirectory
         --build-options
             -DFIND_PACKAGE_TESTING=OFF
             -DVULKAN_HEADERS_ENABLE_MODULE=${VULKAN_HEADERS_ENABLE_MODULE}
-            -DVULKAN_HEADERS_DISABLE_MODULE_STD=${DVULKAN_HEADERS_DISABLE_MODULE_STD}
+            -DVULKAN_HEADERS_DISABLE_MODULE_STD=${VULKAN_HEADERS_DISABLE_MODULE_STD}
 )
 
 set(test_install_dir "${CMAKE_CURRENT_BINARY_DIR}/install")
@@ -33,7 +33,7 @@ add_test(NAME integration.find_package
             -DFIND_PACKAGE_TESTING=ON
             -DCMAKE_PREFIX_PATH=${test_install_dir}
             -DVULKAN_HEADERS_ENABLE_MODULE=${VULKAN_HEADERS_ENABLE_MODULE}
-            -DVULKAN_HEADERS_DISABLE_MODULE_STD=${DVULKAN_HEADERS_DISABLE_MODULE_STD}
+            -DVULKAN_HEADERS_DISABLE_MODULE_STD=${VULKAN_HEADERS_DISABLE_MODULE_STD}
 )
 
 # Installing comes before testing