fix windows warning.

warning C4244: 'argument' : conversion from 'uint64_t' to 'const unsigned int', possible loss of data

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180847 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 2 deletions

diff --git a/include/llvm/ADT/StringRef.h b/include/llvm/ADT/StringRef.h
index 224855e3f8..c00e1a51be 100644
--- a/include/llvm/ADT/StringRef.h
+++ b/include/llvm/ADT/StringRef.h
@@ -390,14 +390,14 @@ namespace llvm {
 
     /// Return a StringRef equal to 'this' but with the first \p N elements
     /// dropped.
-    StringRef drop_front(unsigned N = 1) const {
+    StringRef drop_front(size_t N = 1) const {
       assert(size() >= N && "Dropping more elements than exist");
       return substr(N);
     }
 
     /// Return a StringRef equal to 'this' but with the last \p N elements
     /// dropped.
-    StringRef drop_back(unsigned N = 1) const {
+    StringRef drop_back(size_t N = 1) const {
       assert(size() >= N && "Dropping more elements than exist");
       return substr(0, size()-N);
     }