CMake: Fix incorrect message for cache line size

CMakeModules/DuckStationUtils.cmake

@@ -121,8 +121,8 @@ function(detect_page_size)
     return()
   endif()
 
-  if(HOST_MIN_PAGE_SIZE OR HOST_MAX_PAGE_SIZE)
-    if(NOT HOST_MIN_PAGE_SIZE OR NOT HOST_MAX_PAGE_SIZE)
+  if(DEFINED HOST_MIN_PAGE_SIZE OR DEFINED HOST_MAX_PAGE_SIZE)
+    if(NOT DEFINED HOST_MIN_PAGE_SIZE OR NOT DEFINED HOST_MAX_PAGE_SIZE)
       message(FATAL_ERROR "Both HOST_MIN_PAGE_SIZE and HOST_MAX_PAGE_SIZE must be defined.")
     endif()
     return()
@@ -172,7 +172,7 @@ function(detect_cache_line_size)
   endif()
 
   if(CMAKE_CROSSCOMPILING)
-    message(WARNING "Cross-compiling and can't determine page size, assuming default.")
+    message(WARNING "Cross-compiling and can't determine cache line size, assuming default.")
     return()
   endif()