Potential memory leak: forgetting to free the return value of libxml2 API ‘xmlGetProp’

This issue lies in the plugins/document-manager/anjuta-bookmarks.c:858.

Libxml2 API document of API 'xmlGetProp' emphasizes: Returns: the attribute value or NULL if not found. It's up to the caller to free the memory with xmlFree().. So it can cause memory leak without calling g_free(line_text).