Must use index 0 for funcstack
Must use index 0 for funcstack

Normally zsh arrays start at index 1 but when emulating other shells
this may change.  During completion, we run the command
  emulate -L sh
which affects the indexing of zsh arrays to make it start at 0.

Consequently, when replacing FUNCNAME by funcstack, we should not
change the index.

Signed-off-by: Marc Khouzam <f4a9dd7a4da9e90228a1f1935992f35508714eb1@ville.montreal.qc.ca>

jascott1/helm,appscode/helm,jascott1/helm,appscode/helm