- A couple of small fixes for memory and initialization problems.

This is to make valgrind happy


SKIPPED:
	psi/amorscan.c
	psi/el734hp.c
	psi/psi.c
	psi/tasscan.c

interface.tex

@@ -146,6 +146,8 @@ $\langle$driv {\footnotesize ?}$\rangle\equiv$
 \mbox{}\verb@                   } IDrivable, *pIDrivable;@\\
 \mbox{}\verb@@\\
 \mbox{}\verb@        pIDrivable  GetDrivableInterface(void *pObject);                 @\\
+\mbox{}\verb@        int GetDrivablePosition(void *pObject, SConnection *pCon,@\\
+\mbox{}\verb@                                 float *fPos);@\\
 \mbox{}\verb@@\\
 \mbox{}\verb@@$\diamond$
 \end{list}
@@ -195,6 +197,10 @@ the existence of a drivable interface. If it exists a pointer to it will be
 returned. NEVER free this pointer. If no drivable interface exists, NULL
 will be returned.
 
+{\bf GetDrivablePosition retrieves the position of the drivabel
+object. If the device is a motor corrections for zero points and signs
+will be applied. Returns 1 on success and 0 on failure}
+
 \subsubsection{The Countable Interface}
 This is an interface for interacting with anything which counts.