Fix a somewhat horrendous parity break in struct assembly between the...

Fix a somewhat horrendous parity break in struct assembly between the AssembleEntry shortcut and AssembleKey+AssembleValue.

node/gendemo/tMsg3.go

@@ -361,6 +361,7 @@ func (ma *_Msg3__Assembler) AssembleEntry(k string) (ipld.NodeAssembler, error)
 		}
 		ma.s += fieldBit__Msg3_Whee
 		ma.state = maState_midValue
+		ma.f = 0
 		ma.ca_whee.w = &ma.w.whee
 		ma.ca_whee.m = &ma.cm
 		return &ma.ca_whee, nil
@@ -370,6 +371,7 @@ func (ma *_Msg3__Assembler) AssembleEntry(k string) (ipld.NodeAssembler, error)
 		}
 		ma.s += fieldBit__Msg3_Woot
 		ma.state = maState_midValue
+		ma.f = 1
 		ma.ca_woot.w = &ma.w.woot
 		ma.ca_woot.m = &ma.cm
 		return &ma.ca_woot, nil
@@ -379,6 +381,7 @@ func (ma *_Msg3__Assembler) AssembleEntry(k string) (ipld.NodeAssembler, error)
 		}
 		ma.s += fieldBit__Msg3_Waga
 		ma.state = maState_midValue
+		ma.f = 2
 		ma.ca_waga.w = &ma.w.waga
 		ma.ca_waga.m = &ma.cm
 		return &ma.ca_waga, nil

schema/gen/go/genStruct.go

@@ -424,6 +424,7 @@ func (g structBuilderGenerator) emitMapAssemblerMethods(w io.Writer) {
 				}
 				ma.s += fieldBit__{{ $type | TypeSymbol }}_{{ $field | FieldSymbolUpper }}
 				ma.state = maState_midValue
+				ma.f = {{ $i }}
 				{{- if $field.IsMaybe }}
 				ma.ca_{{ $field | FieldSymbolLower }}.w = {{if not (MaybeUsesPtr $field.Type) }}&{{end}}ma.w.{{ $field | FieldSymbolLower }}.v
 				ma.ca_{{ $field | FieldSymbolLower }}.m = &ma.w.{{ $field | FieldSymbolLower }}.m