Initialize a field in fibonacci_node.

2019-10-23  Martin Liska  <mliska@suse.cz>

	PR middle-end/81669
	* fibonacci_heap.h (fibonacci_node::fibonacci_node):
	Initialize m_data.

From-SVN: r277313

gcc/ChangeLog

+2019-10-23  Martin Liska  <mliska@suse.cz>
+
+	PR middle-end/81669
+	* fibonacci_heap.h (fibonacci_node::fibonacci_node):
+	Initialize m_data.
+
 2019-10-23  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* config/aarch64/aarch64.c (aarch64_emit_approx_sqrt): Use

gcc/fibonacci_heap.h

@@ -56,7 +56,7 @@ class fibonacci_node
 public:
   /* Default constructor.  */
   fibonacci_node (): m_parent (NULL), m_child (NULL), m_left (this),
-    m_right (this), m_degree (0), m_mark (0)
+    m_right (this), m_data (NULL), m_degree (0), m_mark (0)
   {
   }