Fix more -Wshorten-64-to-32 warnings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50659 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/System/Unix/Path.inc b/lib/System/Unix/Path.inc
index aca4b93..9f4b591 100644
--- a/lib/System/Unix/Path.inc
+++ b/lib/System/Unix/Path.inc
@@ -566,7 +566,7 @@
   path.copy(pathname,MAXPATHLEN);
 
   // Null-terminate the last component
-  int lastchar = path.length() - 1 ;
+  size_t lastchar = path.length() - 1 ;
   
   if (pathname[lastchar] != '/')
     ++lastchar;
@@ -639,7 +639,7 @@
   // Otherwise, try to just remove the one directory.
   char pathname[MAXPATHLEN];
   path.copy(pathname, MAXPATHLEN);
-  int lastchar = path.length() - 1 ; 
+  size_t lastchar = path.length() - 1;
   if (pathname[lastchar] == '/') 
     pathname[lastchar] = 0;
   else