Fix error with cmake 2.6

cmake/readline.cmake

@@ -197,11 +197,11 @@ MACRO (MYSQL_CHECK_READLINE)
     # Handle mutual exclusion of WITH_READLINE/WITH_LIBEDIT variables
     # We save current setting to recognize when user switched between
     # WITH_READLINE and WITH_LIBEDIT 
-    IF(WITH_READLINE AND SAVE_READLINE_SETTING MATCHES "WITH_LIBEDIT"
-      OR NOT SAVE_READLINE_SETTING )
+    IF(WITH_READLINE AND (SAVE_READLINE_SETTING MATCHES "WITH_LIBEDIT"
+      OR NOT SAVE_READLINE_SETTING))
       SET(WITH_LIBEDIT OFF CACHE BOOL "Use bundled libedit" FORCE)
-    ELSEIF(WITH_LIBEDIT AND SAVE_READLINE_SETTING MATCHES "WITH_READLINE"
-      OR NOT SAVE_READLINE_SETTING )
+    ELSEIF(WITH_LIBEDIT AND (SAVE_READLINE_SETTING MATCHES "WITH_READLINE"
+      OR NOT SAVE_READLINE_SETTING))
       SET(WITH_READLINE OFF CACHE BOOL "Use bundled readline" FORCE)
     ENDIF()