Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
6	0	EP	call site: 00000	rnp_input_from_memory

Fuzzer calltree


         LLVMFuzzerTestOneInput

[function] [call site] 00000


           rnp_input_from_memory

[call site] 00001


           rnp_ffi_create

[call site] 00002


           rnp_import_signatures

[call site] 00003


           rnp_buffer_destroy

[call site] 00004


           rnp_input_destroy

[call site] 00005


           rnp_ffi_destroy

[call site] 00006