Further macro protection by replacing _[A-Z] with _[A-Z]p

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@145410 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/vector b/include/vector
index 10702f3..1fb6f59 100644
--- a/include/vector
+++ b/include/vector
@@ -1146,8 +1146,8 @@
     }
     else
     {
-        typedef move_iterator<iterator> _I;
-        assign(_I(__x.begin()), _I(__x.end()));
+        typedef move_iterator<iterator> _Ip;
+        assign(_Ip(__x.begin()), _Ip(__x.end()));
     }
 }
 
@@ -1203,8 +1203,8 @@
 {
     if (__base::__alloc() != __c.__alloc())
     {
-        typedef move_iterator<iterator> _I;
-        assign(_I(__c.begin()), _I(__c.end()));
+        typedef move_iterator<iterator> _Ip;
+        assign(_Ip(__c.begin()), _Ip(__c.end()));
     }
     else
         __move_assign(__c, true_type());