[wasm] Fix location for error in asm.js ToNumber conversion

src/wasm/module-decoder.h

Index: src/wasm/module-decoder.h
diff --git a/src/wasm/module-decoder.h b/src/wasm/module-decoder.h
index ba4daed2cb85622330c8b34c9fcdad9feb167551..5efd16214421ecf9659d08f697d27939c5d6c23f 100644
--- a/src/wasm/module-decoder.h
+++ b/src/wasm/module-decoder.h
@@ -18,7 +18,12 @@ typedef Result<const WasmModule*> ModuleResult;
 typedef Result<WasmFunction*> FunctionResult;
 typedef std::vector<std::pair<int, int>> FunctionOffsets;
 typedef Result<FunctionOffsets> FunctionOffsetsResult;
-typedef std::vector<std::vector<std::pair<int, int>>> AsmJsOffsets;
+struct AsmJsOffsetEntry {
+  int byte_offset;
+  int source_position_call;
+  int source_position_number_conversion;
+};
+typedef std::vector<std::vector<AsmJsOffsetEntry>> AsmJsOffsets;
 typedef Result<AsmJsOffsets> AsmJsOffsetsResult;
 
 // Decodes the bytes of a WASM module between {module_start} and {module_end}.