[libFuzzer] When printing NEW_FUNC, use 1-base indexing.

Summary: Otherwise we print things like [0/1] which is visually confusing.

Reviewers: kcc

Reviewed By: kcc

Subscribers: delcypher, llvm-commits, #sanitizers

Differential Revision: https://reviews.llvm.org/D47837

llvm-svn: 334234

compiler-rt/lib/fuzzer/FuzzerTracePC.cpp

@@ -184,7 +184,7 @@ void TracePC::UpdateObservedPCs() {
   }
 
   for (size_t i = 0, N = Min(CoveredFuncs.size(), NumPrintNewFuncs); i < N; i++) {
-    Printf("\tNEW_FUNC[%zd/%zd]: ", i, CoveredFuncs.size());
+    Printf("\tNEW_FUNC[%zd/%zd]: ", i + 1, CoveredFuncs.size());
     PrintPC("%p %F %L\n", "%p\n", CoveredFuncs[i] + 1);
   }
 }