Fixed to define MMSTARGETS **before** the description file is read in.

This references #35.
Adjusted to call Resolve_Symbols after parsing the LHS and RHS of a .IF
directive.  This way we can use builtin functions to test for things like
specific targets included on the command line.

This references #35.
Fixed potential problem with uninitialized pointer.
Fixed potential problem with uninitialized pointer.
Merge pull request #36 from endlesssoftware/issue-35

Issue 35