Parse updated event text and binary format (#1014)

An event has a type-section index, like a function definition. The
current proposal doesn't specify the text format, so I assumed that it
would match the format of the other sections that reference function
types. This means that the following declaration styles are allowed:

```
(type $t (func (param i32)))
(event $e1 (type $t))
(event $e2 (param f32))
```

1 files changed, 5 insertions, 5 deletions

diff --git a/src/binary-reader.h b/src/binary-reader.h
index fb13819b..46424977 100644
--- a/src/binary-reader.h
+++ b/src/binary-reader.h
@@ -116,10 +116,10 @@ class BinaryReaderDelegate {
                                 Type type,
                                 bool mutable_) = 0;
   virtual Result OnImportEvent(Index import_index,
-                                   string_view module_name,
-                                   string_view field_name,
-                                   Index event_index,
-                                   TypeVector& sig) = 0;
+                               string_view module_name,
+                               string_view field_name,
+                               Index event_index,
+                               Index sig_index) = 0;
   virtual Result EndImportSection() = 0;
 
   /* Function section */
@@ -373,7 +373,7 @@ class BinaryReaderDelegate {
   /* Event section */
   virtual Result BeginEventSection(Offset size) = 0;
   virtual Result OnEventCount(Index count) = 0;
-  virtual Result OnEventType(Index index, TypeVector& sig) = 0;
+  virtual Result OnEventType(Index index, Index sig_index) = 0;
   virtual Result EndEventSection() = 0;
 
   /* InitExpr - used by elem, data and global sections; these functions are