Fix an one-byte buffer overflow in string_scan_range
Make webui and r2agent a little more ASan-friendly, use strncmp.
fix an off-by-one bug in r_isprint

Array accesses, yeah.
vio.c: add a missing "int" to r_io_pwrite's declaration
Improve "C?"
"e asm.arch=nonexistent" should not change anal.arch
Add "const" in two places