Fix core dump in ha_ndbcluster::print_results

sql/ha_ndbcluster.cc:
  Should not try to call a function on a NULL pointer
  Adjusted according to coding standard

sql/ha_ndbcluster.cc

@@ -2363,11 +2363,10 @@ void ha_ndbcluster::print_results()
   String val(buf_val, sizeof(buf_val), &my_charset_bin);
   for (uint f=0; f<table->s->fields;f++)
   {
-    // Use DBUG_PRINT since DBUG_FILE cannot be filtered out
+    /* Use DBUG_PRINT since DBUG_FILE cannot be filtered out */
     char buf[2000];
     Field *field;
     void* ptr;
-    const NDBCOL *col= NULL;
     NdbValue value;
     NdbBlob *ndb_blob;
 
@@ -2380,8 +2379,6 @@ void ha_ndbcluster::print_results()
     }
 
     ptr= field->ptr;
-    DBUG_DUMP("field->ptr", (char*)ptr, field->pack_length());
-    col= tab->getColumn(f);
 
     if (! (field->flags & BLOB_FLAG))
     {
@@ -2409,7 +2406,7 @@ void ha_ndbcluster::print_results()
     }
 
 print_value:
-    DBUG_PRINT("value", ("%u,%s: %s", f, col->getName(), buf));
+    DBUG_PRINT("value", ("%u,%s: %s", f, field->field_name, buf));
   }
 #endif
   DBUG_VOID_RETURN;