- amii_set_text_font called CloseLibrary(DiskfontBase) outside the
OpenLibrary guard; on Kickstart V36+ that is a no-op for a NULL
handle, but on V33/V34 it is undefined. Move the close inside
the if-block where DiskfontBase is known non-NULL.
- amii_get_ext_cmd's bounds check used BUFSZ for an obufp[100]
buffer; the tighter COLNO check actually bounded it but the
expression was misleading. Use sizeof obufp.