Prevent using 0 as random seed.

src/base/utils/random-number-generator.cc

Index: src/base/utils/random-number-generator.cc
diff --git a/src/base/utils/random-number-generator.cc b/src/base/utils/random-number-generator.cc
index 53a37526714a127f8ad9bf68677e7d88eaae6496..ff428402b6b7c92faf4dab6cb8569458606ade32 100644
--- a/src/base/utils/random-number-generator.cc
+++ b/src/base/utils/random-number-generator.cc
@@ -124,6 +124,7 @@ int RandomNumberGenerator::Next(int bits) {
 
 
 void RandomNumberGenerator::SetSeed(int64_t seed) {
+  if (seed == 0) seed = 1;
   initial_seed_ = seed;
   state0_ = MurmurHash3(bit_cast<uint64_t>(seed));
   state1_ = MurmurHash3(state0_);