#1 Check return codes everywhere

[Markus Elfring]

Some checks for return codes are missing.

Examples:
Would you like to add more error handling for return values from "strdup" like in the function "mpiP_find_src_loc" and from "read" in the function "mpiPi_get_text_start"?
http://mpip.svn.sourceforge.net/viewvc/mpip/trunk/pc_lookup.c?revision=376&view=markup