warnings: Fix use of a non-standard escape.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@143385 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Core/DataExtractor.cpp b/source/Core/DataExtractor.cpp
index aa60b03..09314a1 100644
--- a/source/Core/DataExtractor.cpp
+++ b/source/Core/DataExtractor.cpp
@@ -1453,7 +1453,7 @@
                 {
                     switch (ch)
                     {
-                    case '\e': s->Printf ("\\e"); break;
+                    case '\033': s->Printf ("\\e"); break;
                     case '\a': s->Printf ("\\a"); break;
                     case '\b': s->Printf ("\\b"); break;
                     case '\f': s->Printf ("\\f"); break;