#1 fix 2 bugs in toptools

[Anonymous]

This is a small patch that fix 2 small bugs I found:
a- in top2ps, on my system, basename() would cause a segfault the way it was written. The 1st part of the patch fixes that, while also creating a backup of the pointer to the filename string (necessary when comes the time to free() as basename() can change the pointer, and so when a path was used in the filename it would cause free() to return an error)

b- in top2svg, between the header and the code, the height and width in the header got inverter, this fixes the code to match the order of the header.

[Nobody/Anonymous]

patch for top2ps.c and top2svg.c