Ticket #1543: Case-insensitive regex search with [^ranges] does not work correctly
Fixed Case-isentetive search with [ranges].
Reason of bug:
content_pattern was initialized via str_create_search_needle() function (from src/strutils.c)
This function convert string to lowercase if case_sentitive is off. Therefore string
'some_string[^a-zA-Z]' was transform into 'some_string[^a-za-z]'
Fix issue:
replace call of str_create_search_needle() function to g_strdup()
Signed-off-by: Slava Zanko <slavazanko@gmail.com>