[Patch, Fortran, committed] Fix two memory leaks

[Tobias Burnus]

I committed (Rev. 196372) after regtesting on x86-64-gnu-linux the 
attached patch.

There are still plenty of leaks in the FE, including surprising ones: 
The program "end" leaks memory while some more complicated programs 
don't. (Tested with valgrind --leak-check=full and compiling with 
-fsyntax-only.)

Tobias
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