Post push fix for Bug#25062396.

Change: Variable initialization.

Change-Id: I2e4afddcfb9651c98a554695b1565fdb1504b69a

sql/gcalc_slicescan.h

@@ -1,4 +1,4 @@
-/* Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. reserved.
+/* Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved. reserved.
    reserved.
 
    This program is free software; you can redistribute it and/or modify
@@ -134,6 +134,7 @@ class Gcalc_heap : public Gcalc_dyn_list
 #ifndef DBUG_OFF
     inline void dbug_print() const;
 #endif
+    Info(): x(0), y(0) {}
   };
 
   Gcalc_heap(size_t blk_size=8192) :

sql/gcalc_tools.cc

@@ -1183,6 +1183,7 @@ int Gcalc_operation_reducer::get_polygon_result(res_point *cur,
     if(glue->up)
       glue->up->down= NULL;
     free_result(glue);
+    cur->glue= NULL;
   }
   DBUG_RETURN(get_result_thread(cur, storage, 1) ||
               storage->complete_shape());

sql/gcalc_tools.h

@@ -200,7 +200,8 @@ class Gcalc_result_receiver
 #endif
   };
 
-  Gcalc_result_receiver() : collection_result(FALSE), n_shapes(0), n_holes(0)
+  Gcalc_result_receiver() : n_points(0), collection_result(FALSE), n_shapes(0),
+    n_holes(0), prev_x(0), prev_y(0), shape_area(0)
     {}
   int start_shape(Gcalc_function::shape_type shape);
   int add_point(double x, double y);
@@ -362,6 +363,8 @@ class Gcalc_operation_reducer : public Gcalc_dyn_list
     m_res_hook= &result->next;
     result->pi= pi;
     result->intersection_point= intersection_point;
+    result->x= 0;
+    result->y= 0;
     return result;
   }