#8 Two TeX bugs

[PChott]

1. <math>min = \begin{cases} inf_{x \in \Phi} P(x), &
\Phi \ne \empty \\ -\infty, & \Phi = \empty
\end{cases}</math>

is complety wrong generated. All in one line. Look:
http://aluno.no-ip.info/juca/index.php/WikiPDF_extension_-_bug_test#BUG_3

2. Max (Φ, P)

the "fi" is missing in pdf. Look:
http://aluno.no-ip.info/juca/index.php/WikiPDF_extension_-_bug_test#BUG_4