patch 9.1.0751: Error callback for term_start() not used

Problem:  Error callback for term_start() not used
          (darkseid-is)
Solution: attach pipe to stderr if an error callback exists

fixes: #15665
closes: #15729

Signed-off-by: Christian Brabandt <cb@256bit.org>

src/version.c

@@ -704,6 +704,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    751,
 /**/
     750,
 /**/