gdb/printers: fix view offsets to start from 0

debug/gdb/printers.py

@@ -53,10 +53,12 @@ class ViewPrinter(object):
                 raise StopIteration
 
             val = self.cursor.dereference()
+            res = ("[%d]" % self.index, val)
+
             self.cursor = self.cursor + 1
             self.index = self.index + 1
 
-            return ("[%d]" % self.index, val)
+            return res
 
     def children(self):
         return self._iterator(