fix warning.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84826 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PIC16/AsmPrinter/PIC16AsmPrinter.cpp b/lib/Target/PIC16/AsmPrinter/PIC16AsmPrinter.cpp
index 08b49c8..ea0f494 100644
--- a/lib/Target/PIC16/AsmPrinter/PIC16AsmPrinter.cpp
+++ b/lib/Target/PIC16/AsmPrinter/PIC16AsmPrinter.cpp
@@ -57,7 +57,7 @@
   if (F->hasSection()) {
     std::string Sectn = F->getSection();
     std::string StrToFind = "Overlay=";
-    unsigned Pos = Sectn.find(StrToFind);
+    std::string::size_type Pos = Sectn.find(StrToFind);
 
     // Retreive the color number if the key is found.
     if (Pos != std::string::npos) {