Support/PathV2: Use SmallVector::clear instead of set_size.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121092 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/PathV2.cpp b/lib/Support/PathV2.cpp
index 492903e..7b99287 100644
--- a/lib/Support/PathV2.cpp
+++ b/lib/Support/PathV2.cpp
@@ -518,7 +518,7 @@
 
 error_code native(const Twine &path, SmallVectorImpl<char> &result) {
   // Clear result.
-  result.set_size(0);
+  result.clear();
 #ifdef LLVM_ON_WIN32
   SmallString<128> path_storage;
   StringRef p = path.toStringRef(path_storage);