Code review comment for lp:~tapaal-contributor/tapaal/fix-tikz-export-1945642

I get the following error when compiling workflow-payment example.

! Package PGF Math Error: Unknown operator `p' or `px' (in '1.33px').

See the PGF Math package documentation for explanation.
Type H <return> for immediate help.
 ...

l.10 ...ale=0.45, yscale=0.45, x=1.33px, y=1.33px]

?