Merge pull request #15 from dgorbash/master

Fix fetch_innodb_stats runtime error (#11)

Author: chrisboulton

mysql.py

@@ -477,7 +477,8 @@ def fetch_innodb_stats(conn):
 				for key in MYSQL_INNODB_STATUS_MATCHES[match]:
 					value = MYSQL_INNODB_STATUS_MATCHES[match][key]
 					if type(value) is int:
-						stats[key] = int(row[value])
+						if value < len(row) and row[value].isdigit():
+							stats[key] = int(row[value])
 					else:
 						stats[key] = value(row, stats)
 				break