Fix place where linter complains about lonely {...

src/runtime.cc

 // Copyright 2006-2008 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 2240 matching lines @@
   return (hi << 4) + lo;
 }
 
 
 static inline int Unescape(String* source,
                            StringShape shape,
                            int i,
                            int length,
                            int* step) {
   uint16_t character = source->Get(shape, i);
-  int32_t hi, lo;
+  int32_t hi = 0;
+  int32_t lo = 0;
   if (character == '%' &&
       i <= length - 6 &&
       source->Get(shape, i + 1) == 'u' &&
       (hi = TwoDigitHex(source->Get(shape, i + 2),
                         source->Get(shape, i + 3))) != -1 &&
       (lo = TwoDigitHex(source->Get(shape, i + 4),
                         source->Get(shape, i + 5))) != -1) {
     *step = 6;
     return (hi << 8) + lo;
   } else if (character == '%' &&
@@ skipping 3578 matching lines @@
   } else {
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     Counters::gc_last_resort_from_js.Increment();
     Heap::CollectAllGarbage();
   }
 }
 
 
 } }  // namespace v8::internal