libxc: remove unnecessary double indirection from xc_readconsolering

The double indirection has been unnecessary since 9867:ec61a8c25429,
there is no possibility of the buffer being reallocated now.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>

tools/python/xen/lowlevel/xc/xc.c

@@ -1116,7 +1116,7 @@ static PyObject *pyxc_readconsolering(XcObject *self,
          !str )
         return NULL;
 
-    ret = xc_readconsolering(self->xc_handle, &str, &count, clear,
+    ret = xc_readconsolering(self->xc_handle, str, &count, clear,
                              incremental, &index);
     if ( ret < 0 )
         return pyxc_error_to_exception(self->xc_handle);
@@ -1133,7 +1133,7 @@ static PyObject *pyxc_readconsolering(XcObject *self,
 
         str = ptr + count;
         count = size - count;
-        ret = xc_readconsolering(self->xc_handle, &str, &count, clear,
+        ret = xc_readconsolering(self->xc_handle, str, &count, clear,
                                  1, &index);
         if ( ret < 0 )
             break;