Fix name duplicate check to only run when the template name is changed

Without checking first, a rename is required for all thumbnail template modifications.

thrimshim/thrimshim/main.py

@@ -724,6 +724,7 @@ def update_template(name, artist=None):
 		if results.fetchone() is None:
 			return 'Template with name {} does not exist'.format(name), 400
 		# check if new name is in database
+		if name != new_template["name"]:
 			query = sql.SQL("""
 				SELECT name FROM templates WHERE name = %s 
 			""")