GSL master and Asan findings

[Jeffrey Walton]

Hi Everyone/Patrick,

A quick testing pass with CFLAGS that include '-fsanitize=address'
shows some memory errors in the library or test suite.

It appears to be limited to matrix class and testing.

=====================================
$ cat gsl-2.6/matrix/test-suite.log
...
==7058==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x7f59e568ab40 in __interceptor_malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)
    #1 0x556e12fc4a63 in gsl_vector_complex_alloc
/home/jwalton/Build-Scripts/gsl-2.6/vector/init_source.c:26
    #2 0x556e12eff45d in test_complex_ops
/home/jwalton/Build-Scripts/gsl-2.6/matrix/test_complex_source.c:753
    #3 0x556e12ef4ab8 in main
/home/jwalton/Build-Scripts/gsl-2.6/matrix/test.c:187
    #4 0x7f59e4bd6b96 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21b96)

Direct leak of 40 byte(s) in 1 object(s) allocated from:
    #0 0x7f59e568ab40 in __interceptor_malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)
    #1 0x556e12fc40d3 in gsl_vector_complex_long_double_alloc
/home/jwalton/Build-Scripts/gsl-2.6/vector/init_source.c:26
    #2 0x556e12ef92bf in test_complex_long_double_ops
/home/jwalton/Build-Scripts/gsl-2.6/matrix/test_complex_source.c:716
    #3 0x556e12ef4ad6 in main
/home/jwalton/Build-Scripts/gsl-2.6/matrix/test.c:189
    #4 0x7f59e4bd6b96 in __libc_start_main
(/lib/x86_64-linux-gnu/libc.so.6+0x21b96)
...