[LyX/master] Ensure that iconv and zlib are always found

[Georg Baum]

commit 5ef180842c65b775f503a0e6ae617a43da4f1afc
Author: Georg Baum <b...@lyx.org>
Date:   Sat Jul 2 11:09:26 2016 +0200

    Ensure that iconv and zlib are always found
    
    If the included thirdparty libs are requested, use them, even on unix. This 
is
    consistent with autotools (but the recommended way is of course to use the
    system libs). If the included thirdparty libs are not requested then try to 
find
    libiconv and zlib also on windows. This will lead to an error unless the 
libs are
    found via manually added include and link paths, but this is wanted since
    libiconv and zlib are not optional.
---
 CMakeLists.txt |   10 ++++------
 1 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 667f76e..3c9ab63 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -706,15 +706,13 @@ if(LYX_NLS)
        endif()
 endif()
 
-if(UNIX)
-    find_package(ICONV REQUIRED)
-    find_package(ZLIB REQUIRED)
-else()
-    if(LYX_3RDPARTY_BUILD)
+if(LYX_3RDPARTY_BUILD)
        add_subdirectory(3rdparty/libiconv)
        set(HAVE_ICONV_CONST 1)
        add_subdirectory(3rdparty/zlib)
-    endif()
+else()
+       find_package(ICONV REQUIRED)
+       find_package(ZLIB REQUIRED)
 endif()
 
 if(LYX_EXTERNAL_BOOST)