Revert word array length change

It turns out that the rfc sets a limit of 15 arguments and the
server (irccloud) sending that many in ISUPPORT was updated to
split it into multiple lines.

plugins/lua/lua.c

@@ -35,7 +35,7 @@
 
 #include <hexchat-plugin.h>
 
-#define WORD_ARRAY_LEN 48
+#define WORD_ARRAY_LEN 32
 
 static char plugin_name[] = "Lua";
 static char plugin_description[] = "Lua scripting interface";