fix dependency load order + minor cmake change

CMakeLists.txt

@@ -79,6 +79,8 @@ endif()
 
 find_package(OpenGL REQUIRED)
 find_package(GLEW REQUIRED)
+find_package(glfw3 REQUIRED)
+find_package(glm REQUIRED)
 find_package(OpenAL REQUIRED)
 find_package(ZLIB REQUIRED)
 
@@ -86,15 +88,11 @@ if (WIN32)
     if(VOXELENGINE_BUILD_WINDOWS_VCPKG)
       set(LUA_LIBRARIES "${CMAKE_CURRENT_SOURCE_DIR}/vcpkg/packages/luajit_x64-windows/lib/lua51.lib")
       set(LUA_INCLUDE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/vcpkg/packages/luajit_x64-windows/include/luajit")
-      find_package(glfw3 REQUIRED)
-      find_package(spng REQUIRED)
-      find_package(glm REQUIRED)
-      set(PNGLIB spng::spng)
     else()
       find_package(Lua REQUIRED)
-      set(PNGLIB spng)
-      add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/libs/glfw)
     endif()
+    find_package(spng REQUIRED)
+    set(PNGLIB spng::spng)
 else()
     # luajit has no CMakeLists.txt to use it as subdirectory, so install it manually
     find_package(Lua REQUIRED)