attempt to quash a warning by storing the result of write() in _sigchld.c is unsuccessful

[glyph]

We should apply this:

twisted/internet/_sigchld.c

@@ -12 +12 @@
 
 static void got_signal(int sig) {
     int saved_errno = errno;
-    int ignored_result;
+    ssize_t ignored_result;
 
     /* write() errors are unhandled.  If the buffer is full, we don't
      * care.  What about other errors? */

since, in fact, write() returns ssize_t and not int. (Sometimes they're the same thing, sometimes not.)

[ashfall]

(In [34658]) Branching to 'store-write-result-sigchld-5734'

[ashfall]

Looks good to me. Please add a news file and merge.

 Build Results

[glyph]

(In [34829]) Merge store-write-result-sigchld-5734

Author: glyph

Reviewer: ashfall

Fixes: #5734

Fix a minor defect in _sigchld.c; store the result of a function in a container declared to be of the correct size, rather than the incorrect size.