[PATCH] Use -std=c++11 when no arguments are provided.

[Edwin Vane]

================
Comment at: cpp11-migrate/tool/Cpp11Migrate.cpp:247-249
@@ +246,5 @@
+    }
+    if (!Compilations) {
+      llvm::report_fatal_error(ErrorMessage);
+    }
+  }
----------------
Single-line if statement has no braces.


http://llvm-reviews.chandlerc.com/D1337