PPC: initializing array to fix compiler error maybe-uninitialized

src/uri.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/uri.h"
 
 #include "src/char-predicates-inl.h"
 #include "src/handles.h"
 #include "src/isolate-inl.h"
 #include "src/list.h"
@@ skipping 223 matching lines @@
   }
 }
 
 void AddHexEncodedToBuffer(uint8_t octet, List<uint8_t>* buffer) {
   buffer->Add('%');
   buffer->Add(HexCharOfValue(octet >> 4));
   buffer->Add(HexCharOfValue(octet & 0x0F));
 }
 
 void EncodeSingle(uc16 c, List<uint8_t>* buffer) {
-  char s[4];
+  char s[4] = {};
   int number_of_bytes;
   number_of_bytes =
       unibrow::Utf8::Encode(s, c, unibrow::Utf16::kNoPreviousCharacter, false);
   for (int k = 0; k < number_of_bytes; k++) {
     AddHexEncodedToBuffer(s[k], buffer);
   }
 }
 
 void EncodePair(uc16 cc1, uc16 cc2, List<uint8_t>* buffer) {
   char s[4];
@@ skipping 41 matching lines @@
       AllowHeapAllocation allocate_error_and_return;
       THROW_NEW_ERROR(isolate, NewURIError(), String);
     }
   }
 
   return isolate->factory()->NewStringFromOneByte(buffer.ToConstVector());
 }
 
 }  // namespace internal
 }  // namespace v8