Fix a build---increase array's size.

src/regexp-macro-assembler-tracer.cc

Index: src/regexp-macro-assembler-tracer.cc
diff --git a/src/regexp-macro-assembler-tracer.cc b/src/regexp-macro-assembler-tracer.cc
index 522042262f58e561c88f9f00464b7ad5685b9078..c08602eb1ce97cb71a0540f34e3aaf35a6603764 100644
--- a/src/regexp-macro-assembler-tracer.cc
+++ b/src/regexp-macro-assembler-tracer.cc
@@ -38,7 +38,7 @@ RegExpMacroAssemblerTracer::RegExpMacroAssemblerTracer(
   assembler_(assembler) {
   unsigned int type = assembler->Implementation();
   ASSERT(type < 4);
-  const char* impl_names[3] = {"IA32", "ARM", "X64", "Bytecode"};
+  const char* impl_names[4] = {"IA32", "ARM", "X64", "Bytecode"};
   PrintF("RegExpMacroAssembler%s();\n", impl_names[type]);
 }