[Patch, Fortran, committed] PR58579 - fix allocation of string temporaries: Avoid overallocation

[Tobias Burnus]

In gfc_conv_string_tmp, gfortran allocates temporary strings. However, 
using "TYPE_SIZE (type)" didn't yield one byte as intended but 64 - 
which means that gfortran allocated 64 times as much memory as needed.

I wonder whether the same issue also occurs elsewhere.

Committed (Rev. ) after building and regtesting on x86-64-gnu-linux. I 
didn't see a simple way to generate a test case - but the dump of the 
PR's test case looks fine both for kind=1 and kind=4 strings.

Tobias
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