Fix Windows build using portable types for formatting the log outputs

llvm-svn: 202723
diff --git a/lldb/source/Core/Stream.cpp b/lldb/source/Core/Stream.cpp
index 49c15d6..075b705 100644
--- a/lldb/source/Core/Stream.cpp
+++ b/lldb/source/Core/Stream.cpp
@@ -479,7 +479,7 @@
     va_list args;
     va_list args_copy;
     va_start (args, format);
-    va_copy (args, args_copy); // Copy this so we
+    va_copy (args_copy,args); // Copy this so we
 
     char str[1024];
     size_t bytes_written = 0;