Fixes a typo that causes Reserve(X) to both re-allocate the container and

change the last index (i.e. to X), which has unintended consequences for
Reserve(X) followed by Append().

llvm-svn: 190785

lldb/include/lldb/Core/RangeMap.h

@@ -592,7 +592,7 @@ namespace lldb_private {
         void
         Reserve (typename Collection::size_type size)
         {
-            m_entries.resize (size);
+            m_entries.reserve (size);
         }
 
         bool