fix typo in compressible flow documentation.

docs/user-guide/solvers/compressible-flow.tex

@@ -221,7 +221,7 @@ to screen;
 \item \inltt{TInf} farfield temperature (i.e. $T_{\infty}$). Default value = 288.15 $K$;
 \item \inltt{Twall} temperature at the wall when isothermal boundary 
 conditions are employed (i.e. $T_{w}$). Default value = 300.15$K$;
-\item \inltt{uint} farfield $X$-component of the velocity (i.e. $u_{\infty}$). Default value = 0.1 $m/s$;
+\item \inltt{uInf} farfield $X$-component of the velocity (i.e. $u_{\infty}$). Default value = 0.1 $m/s$;
 \item \inltt{vInf} farfield $Y$-component of the velocity (i.e. $v_{\infty}$). Default value = 0.0 $m/s$;
 \item \inltt{wInf} farfield $Z$-component of the velocity (i.e. $w_{\infty}$). Default value = 0.0 $m/s$;
 \item \inltt{mu} dynamic viscosity (i.e. $\mu_{\infty}$). Default value = 1.78e-05 $Pa s$;