patch 7.4.1852

Problem:    Unix: Cannot run all tests with the GUI.
Solution:   Add the "testgui" target.

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1852,
 /**/
     1851,
 /**/