patch 7.4.1350

Problem:    When the test server fails to start Vim hangs.
Solution:   Check that there is actually something to read from the tty fd.

src/os_unix.c

@@ -5350,6 +5350,7 @@ WaitForChar(long msec)
 RealWaitForChar(int fd, long msec, int *check_for_gpm UNUSED)
 {
     int		ret;
+    int		result;
 #if defined(FEAT_XCLIPBOARD) || defined(USE_XSMP) || defined(FEAT_MZSCHEME)
     static int	busy = FALSE;
 
@@ -5466,6 +5467,9 @@ RealWaitForChar(int fd, long msec, int *check_for_gpm UNUSED)
 #endif
 
 	ret = poll(fds, nfd, towait);
+
+	result = ret > 0 && (fds[0].revents & POLLIN);
+
 # ifdef FEAT_MZSCHEME
 	if (ret == 0 && mzquantum_used)
 	    /* MzThreads scheduling is required and timeout occurred */
@@ -5613,6 +5617,10 @@ select_eintr:
 # endif
 
 	ret = select(maxfd + 1, &rfds, NULL, &efds, tvp);
+	result = ret > 0 && FD_ISSET(fd, &rfds);
+	if (result)
+	    --ret;
+
 # ifdef EINTR
 	if (ret == -1 && errno == EINTR)
 	{
@@ -5733,7 +5741,7 @@ select_eintr:
 #endif
     }
 
-    return (ret > 0);
+    return result;
 }
 
 #ifndef NO_EXPANDPATH

src/version.c

@@ -747,6 +747,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1350,
 /**/
     1349,
 /**/