Make it clearer how to enable localisation.

CMakeLists.txt

@@ -43,12 +43,12 @@ endif()
 # Find gettext
 find_package(Gettext)
 find_package(Intl)
-if(GETTEXT_FOUND AND Intl_FOUND)
+if(Gettext_FOUND AND Intl_FOUND)
   set(HAVE_LOCALIZATION ON)
   include_directories(${Intl_INCLUDE_DIRS})
   link_libraries(${Intl_LIBRARIES})
 else()
-  message("Unable to find gettext and libintl; disabling localization")
+  message(STATUS "Unable to find gettext and/or libintl -- read docs/LANGUAGE for how to enable localization")
   set(HAVE_LOCALIZATION OFF)
 endif()
 

src/language.cpp

@@ -54,7 +54,7 @@ void Language::InitLanguages()
 		Languages.push_back(language);
 	}
 #else
-	Log() << "Unable to initialize languages, gettext is not installed";
+	Log() << "Unable to initialize languages, gettext and/or libintl were not installed at build time";
 #endif
 }