[perl #41746] [BUG] pdump doesn't build.

[Will Coleda]

# New Ticket Created by Will Coleda
# Please include the string: [perl #41746]
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$ make pdump
src/packdump.c
src/packdump.c: In function 'PackFile_Constant_dump':
src/packdump.c:220: error: 'struct Parrot_sub' has no member named
'namespace'
src/packdump.c:221: error: 'struct Parrot_sub' has no member named
'namespace'
src/packdump.c:224: error: 'struct Parrot_sub' has no member named
'namespace'
src/packdump.c:228: error: 'struct Parrot_sub' has no member named
'namespace'
src/packdump.c:231: error: 'struct Parrot_sub' has no member named
'namespace'
make: *** [src/packdump.o] Error 1