Fix warning about discarding const in init_index2()#2550
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The warning is a bit odd, as the variable in question is initialised from strstr() which is supposed to return `char *` (even though the input is `const char *`). However, as there are no writes to the new pointer, there's no problem with changing it to a `const char *`. Signed-off-by: Rob Davies <rmd+git@sanger.ac.uk>
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The warning is a bit odd, as the variable in question is initialised from
strstr()which is supposed to returnchar *(even though the input isconst char *). However, as there are no writes to the new pointer, there's no problem with changing it to aconst char *.