Quote TO_CMAKE_PATH args (#25)

Author: dislogical

CMakeLists.txt

@@ -14,11 +14,11 @@ cmake_minimum_required (VERSION 3.1)
 project (aws-c-event-stream C)
 
 if (DEFINED CMAKE_PREFIX_PATH)
-    file(TO_CMAKE_PATH ${CMAKE_PREFIX_PATH} CMAKE_PREFIX_PATH)
+    file(TO_CMAKE_PATH "${CMAKE_PREFIX_PATH}" CMAKE_PREFIX_PATH)
 endif()
 
 if (DEFINED CMAKE_INSTALL_PREFIX)
-    file(TO_CMAKE_PATH ${CMAKE_INSTALL_PREFIX} CMAKE_INSTALL_PREFIX)
+    file(TO_CMAKE_PATH "${CMAKE_INSTALL_PREFIX}" CMAKE_INSTALL_PREFIX)
 endif()
 
 if (UNIX AND NOT APPLE)