ARM: Fix wrong fall through handling

src/arm/full-codegen-arm.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 413 matching lines @@
                                           true,
                                           true_label_,
                                           false_label_);
   ASSERT(!lit->IsUndetectableObject());  // There are no undetectable literals.
   if (lit->IsUndefined() || lit->IsNull() || lit->IsFalse()) {
     if (false_label_ != fall_through_) __ b(false_label_);
   } else if (lit->IsTrue() || lit->IsJSObject()) {
     if (true_label_ != fall_through_) __ b(true_label_);
   } else if (lit->IsString()) {
     if (String::cast(*lit)->length() == 0) {
-    if (false_label_ != fall_through_) __ b(false_label_);
-      __ b(false_label_);
+      if (false_label_ != fall_through_) __ b(false_label_);
     } else {
       if (true_label_ != fall_through_) __ b(true_label_);
     }
   } else if (lit->IsSmi()) {
     if (Smi::cast(*lit)->value() == 0) {
       if (false_label_ != fall_through_) __ b(false_label_);
     } else {
       if (true_label_ != fall_through_) __ b(true_label_);
     }
   } else {
@@ skipping 3919 matching lines @@
   __ mov(r1, Operand(r1, ASR, 1));  // Un-smi-tag value.
   __ add(pc, r1, Operand(masm_->CodeObject()));
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM