stralloc_starts(3)check if string is prefix of stralloc
SYNTAX
#include <stralloc.h>
int stralloc_starts(stralloc* sa,const char* in);
DESCRIPTION
stralloc_starts returns 1 if the \0-terminated string in in, without
the terminating \0, is a prefix of the string stored in sa. Otherwise
it returns 0. sa must already be allocated.
