[libFuzzer] respect max_len during merge

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/fuzzer@318302 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/FuzzerMerge.cpp b/FuzzerMerge.cpp
index 9b21a09..934871b 100644
--- a/FuzzerMerge.cpp
+++ b/FuzzerMerge.cpp
@@ -379,7 +379,7 @@
   Printf("MERGE-OUTER: %zd new files with %zd new features added\n",
          NewFiles.size(), NumNewFeatures);
   for (auto &F: NewFiles)
-    WriteToOutputCorpus(FileToVector(F));
+    WriteToOutputCorpus(FileToVector(F, MaxInputLen));
   // We are done, delete the control file if it was a temporary one.
   if (!MergeControlFilePathOrNull)
     RemoveFile(CFPath);