check ids of broadcast messages & custom blocks

[Ellen102]

Some ids are auto-generated, this means they were not set correctly.

<xml xmlns="http://www.w3.org/1999/xhtml"><variables></variables><block type="procedures_definition" id="block_0" x="0" y="0"><statement name="custom_block"><shadow type="procedures_prototype" id=":/=kMACCg(^eeOvxvG*w"><mutation proccode=" %s" argumentids="[&quot;x&quot;]" argumentnames="[&quot;x&quot;]" argumentdefaults="null" warp="null"></mutation><value name="x"><shadow type="argument_reporter_string_number" id="%Rf1w6-CNUh}jG~sED?0"><field name="VALUE">x</field></shadow></value></shadow></statement></block><block type="argument_reporter_string_number" id="block_1" x="0" y="120"><field name="VALUE">x</field></block></xml>

<xml xmlns="http://www.w3.org/1999/xhtml"><variables><variable type="broadcast_msg" id="variable_0" islocal="false">m</variable></variables><block type="event_broadcast" id="block_0" x="0" y="0"><value name="BROADCAST_INPUT"><shadow type="event_broadcast_menu" id="Ca]p7ch2!27kQ+sVxLZ?"><field name="BROADCAST_OPTION" id="variable_0" variabletype="broadcast_msg">m</field></shadow></value></block></xml>