attempt issue ID parsing from pull request section

Author: bivas

bot/connector/github/builder.go

@@ -62,7 +62,11 @@ func (builder *eventDataBuilder) readPayload(context *builderContext, r *http.Re
 }
 
 func (builder *eventDataBuilder) readFromJson(context *builderContext, payload *payload) {
-	context.data.number = payload.Number
+	if payload.PullRequest.Number > 0 {
+		context.data.number = payload.PullRequest.Number
+	} else {
+		context.data.number = payload.Number
+	}
 	context.data.title = payload.PullRequest.Title
 	context.data.changedFiles = payload.PullRequest.ChangedFiles
 	context.data.additions = payload.PullRequest.Additions

bot/connector/github/json.go

@@ -1,6 +1,7 @@
 package github
 
 type pullRequestSection struct {
+	Number       int    `json:"number"`
 	State        string `json:"state"`
 	Title        string `json:"title"`
 	Commits      int    `json:"commits"`