Updated the portion of fill_in_indtargs that looks through the data segments...

Updated the portion of fill_in_indtargs that looks through the data segments of a program to find pointers such that 64-bit code needs to find a 64-bit pointer, otherwise it's likely not a pointer.  Was getting spurious false hits from an array of shorts that contained characters such that strings like 00490078 would be found as a valid pointer, when in fact it isn't.

Former-commit-id: 0a8b679c83422264fcdf91b8155fe4cd6e9ddc81