[wasm] Only use the table maximum in allocation if it is non-zero.

src/wasm/wasm-module.cc

Index: src/wasm/wasm-module.cc
diff --git a/src/wasm/wasm-module.cc b/src/wasm/wasm-module.cc
index dc34d52d21279c6ed565ffa828d5982f0d99e236..e789982ba8b58b75f469cab1f7d1dd7d11a849d7 100644
--- a/src/wasm/wasm-module.cc
+++ b/src/wasm/wasm-module.cc
@@ -1042,7 +1042,7 @@ class WasmInstanceBuilder {
           factory->NewFixedArray(function_table_count);
       for (int index = 0; index < function_table_count; ++index) {
         WasmIndirectFunctionTable& table = module_->function_tables[index];
-        uint32_t size = table.max_size;
+        uint32_t size = table.max_size > 0 ? table.max_size : table.size;

[ahaas, 2016/10/20 09:09:42]

Could we just set the default value of table.max_size to kMaxTableSize instead
of setting it to 0?

         Handle<FixedArray> new_table = factory->NewFixedArray(size * 2);
         for (int i = 0; i < new_table->length(); ++i) {
           static const int kInvalidSigIndex = -1;