* CMakeLists.txt: Error if MIN_WINDOWS_VER set to Vista.

git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@1859516 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/CMakeLists.txt b/CMakeLists.txt
index b8caa14..37e3c43 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -87,7 +87,7 @@
 IF("${MIN_WINDOWS_VER}" STREQUAL "")
   SET(win32_winnt_str "0x0601")
 ELSEIF(${MIN_WINDOWS_VER} STREQUAL "Vista")
-  SET(win32_winnt_str "0x0600")
+  MESSAGE(FATAL_ERROR "Minimum supported Windows version is Windows 7/Windows Server 2008 R2")
 ELSEIF(${MIN_WINDOWS_VER} STREQUAL "Windows7")
   SET(win32_winnt_str "0x0601")
 ELSE()