patch 7.4.1611
Problem:    The versplit feature makes the code uneccessary complicated.
Solution:   Remove FEAT_VERTSPLIT, always support vertical splits when
            FEAT_WINDOWS is defined.
diff --git a/src/if_py_both.h b/src/if_py_both.h
index 8070bd6..3a80cb4 100644
--- a/src/if_py_both.h
+++ b/src/if_py_both.h
@@ -3673,8 +3673,6 @@
 #ifdef FEAT_WINDOWS
     else if (strcmp(name, "row") == 0)
 	return PyLong_FromLong((long)(self->win->w_winrow));
-#endif
-#ifdef FEAT_VERTSPLIT
     else if (strcmp(name, "width") == 0)
 	return PyLong_FromLong((long)(W_WIDTH(self->win)));
     else if (strcmp(name, "col") == 0)
@@ -3765,7 +3763,7 @@
 
 	return 0;
     }
-#ifdef FEAT_VERTSPLIT
+#ifdef FEAT_WINDOWS
     else if (strcmp(name, "width") == 0)
     {
 	long	width;