Fix regression in string literal alignment.

Now correctly indents (again):
a = a + "a"
        "a"
        "a";

llvm-svn: 175630
diff --git a/clang/lib/Format/Format.cpp b/clang/lib/Format/Format.cpp
index aca5d36..44a91a9 100644
--- a/clang/lib/Format/Format.cpp
+++ b/clang/lib/Format/Format.cpp
@@ -692,7 +692,7 @@
       State.Stack.pop_back();
     }
 
-    if (Current.is(tok::string_literal) && State.StartOfStringLiteral == 0) {
+    if (Current.is(tok::string_literal)) {
       State.StartOfStringLiteral = State.Column;
     } else if (Current.isNot(tok::comment)) {
       State.StartOfStringLiteral = 0;