Fix GCC v10.2 warnings about ignored return values of 'write'

The return value of x11_event() isn't actually checked anywhere currently, but
still Deuce might want to adjust the new return value here (__LINE__ or -1?).

Some indicental trailing whitespace was auto-cleaned up part of this commit.
Unexpected as I thought this code had been uncrustified already.

src/conio/x_events.c

@@ -1604,7 +1604,8 @@ static int x11_event(XEvent *ev)
 		case ClientMessage:
 			if (ev->xclient.format == 32 && ev->xclient.data.l[0] == A(WM_DELETE_WINDOW) && A(WM_DELETE_WINDOW) != None) {
 				uint16_t key=CIO_KEY_QUIT;
-				write(key_pipe[1], &key, 2);
+				if(write(key_pipe[1], &key, 2) != 2)
+					return errno;
 			}
 			else if(ev->xclient.format == 32 && ev->xclient.data.l[0] == A(_NET_WM_PING) && A(_NET_WM_PING) != None) {
 				ev->xclient.window = root;
@@ -1896,7 +1897,8 @@ static int x11_event(XEvent *ev)
 								else
 									ch = cpchar_from_unicode_cpoint(getcodepage(), wbuf[i], 0);
 								if (ch) {
-									write(key_pipe[1], &ch, 1);
+									if(write(key_pipe[1], &ch, 1) != 1)
+										return errno;
 								}
 							}
 							break;
@@ -2106,7 +2108,8 @@ static int x11_event(XEvent *ev)
 							uint16_t key=scan;
 							if (key < 128)
 								key = cpchar_from_unicode_cpoint(getcodepage(), key, key);
-							write(key_pipe[1], &key, (scan&0xff)?1:2);
+							if(write(key_pipe[1], &key, (scan&0xff)?1:2) < 1)
+								return errno;
 						}
 						break;
 				}