warning: ‘decomp.m_dist_from_out_buf_start’ is used uninitialized in this function

[fefe17]

I get this warning from g++ 8.1 (on a C++ file that #includes the miniz.c from amalgamate.sh of current git head):

miniz.c: In function ‘tinfl_decompress_mem_to_mem.constprop’:
miniz.c:2367:29: warning: ‘decomp.m_dist_from_out_buf_start’ is used uninitialized in this function [-Wuninitialized]
     dist_from_out_buf_start = r->m_dist_from_out_buf_start;
                             ^

My code is actually calling tinfl_decompress_mem_to_mem.