Fixed compilation error

ensure check_if_legal_table_name is also defined on unix

mysys/my_access.c

@@ -156,6 +156,14 @@ int check_if_legal_tablename(const char *name)
               str_list_find(&reserved_names[1], name));
 }
 
+#else
+
+int check_if_legal_tablename(const char *name)
+{
+  return 0;
+}
+
+#endif /* defined(MSDOS) || defined(__WIN__) */
 
 #if defined(MSDOS) || defined(__WIN__) || defined(__EMX__)
 
@@ -199,4 +207,5 @@ int check_if_legal_filename(const char *path)
   }
   DBUG_RETURN(0);
 }
-#endif
+
+#endif /* defined(MSDOS) || defined(__WIN__) || defined(__EMX__) */