updated for version 7.3.330
Problem:    When longjmp() is invoked if the X server gives an error the state
            is not properly restored.
Solution:   Reset vgetc_busy. (Yukihiro Nakadaira)
diff --git a/src/main.c b/src/main.c
index 5d3e699..2044893 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1009,6 +1009,7 @@
 	skip_redraw = FALSE;
 	RedrawingDisabled = 0;
 	no_wait_return = 0;
+	vgetc_busy = 0;
 # ifdef FEAT_EVAL
 	emsg_skip = 0;
 # endif