From 9613e0b2b259ee5963332275c84d4a7fdff4696b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Vladim=C3=ADr=20Vondru=C5=A1?= <mosra@centrum.cz>
Date: Tue, 14 Jun 2016 08:28:32 +0200
Subject: [PATCH] modules: properly handle platforms with empty
 CMAKE_FIND_LIBRARY_PREFIXES.

For example Windows with MSVC. The variable is set to empty list, which
we need to preserve when setting it back. Otherwise CMake complains
loudly.
---
 modules/FindMagnum.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/FindMagnum.cmake b/modules/FindMagnum.cmake
index 5c88350fe..ef0058348 100644
--- a/modules/FindMagnum.cmake
+++ b/modules/FindMagnum.cmake
@@ -422,7 +422,7 @@ foreach(_component ${Magnum_FIND_COMPONENTS})
                 MAGNUM_${_COMPONENT}_LIBRARY_RELEASE)
 
             # Reset back
-            set(CMAKE_FIND_LIBRARY_PREFIXES ${_tmp_prefixes})
+            set(CMAKE_FIND_LIBRARY_PREFIXES "${_tmp_prefixes}")
         endif()
 
         # Library location for libraries/plugins