[minor] feature to restrict no of rows in report

frappe/email/doctype/auto_email_report/auto_email_report.json

@@ -143,6 +143,34 @@
    "set_only_once": 0, 
    "unique": 0
   }, 
+  {
+   "allow_on_submit": 0, 
+   "bold": 0, 
+   "collapsible": 0, 
+   "columns": 0, 
+   "default": "100", 
+   "description": "Max 500", 
+   "fieldname": "no_of_rows", 
+   "fieldtype": "Int", 
+   "hidden": 0, 
+   "ignore_user_permissions": 0, 
+   "ignore_xss_filter": 0, 
+   "in_filter": 0, 
+   "in_list_view": 0, 
+   "label": "No of Rows", 
+   "length": 0, 
+   "no_copy": 0, 
+   "permlevel": 0, 
+   "precision": "", 
+   "print_hide": 0, 
+   "print_hide_if_no_value": 0, 
+   "read_only": 0, 
+   "report_hide": 0, 
+   "reqd": 0, 
+   "search_index": 0, 
+   "set_only_once": 0, 
+   "unique": 0
+  }, 
   {
    "allow_on_submit": 0, 
    "bold": 0, 
@@ -445,7 +473,7 @@
  "issingle": 0, 
  "istable": 0, 
  "max_attachments": 0, 
- "modified": "2016-09-15 01:32:57.454880", 
+ "modified": "2016-09-22 07:31:59.959051", 
  "modified_by": "Administrator", 
  "module": "Email", 
  "name": "Auto Email Report", 

frappe/email/doctype/auto_email_report/auto_email_report.py

@@ -42,7 +42,7 @@ class AutoEmailReport(Document):
 	def get_report_content(self):
 		'''Returns file in for the report in given format'''
 		report = frappe.get_doc('Report', self.report)
-		raw = report.get_data(limit=500, user = self.user, filters = self.filters)
+		raw = report.get_data(limit=self.no_of_rows or 100, user = self.user, filters = self.filters)
 
 		if self.format == 'HTML':
 			return self.get_html_table(raw)