Put important checks back.

diff --git a/drawing.cpp b/drawing.cpp
index ac3e8d7edace1b4aaaa67219b14552989ced8f66..45118b718ab313c6425b1cb079c5cda4a178abdb 100644 (file)
--- a/drawing.cpp
+++ b/drawing.cpp
@@ -4799,7 +4799,7 @@ void hsync_record_line_state (int lineno, enum nln_how how, int changed)
                }
                break;
        case nln_lower:
-               if (state[-1] == LINE_UNDECIDED) {
+               if (lineno > 0 && state[-1] == LINE_UNDECIDED) {
                        state[-1] = LINE_DECIDED; //LINE_BLACK;
                }
                *state = changed ? LINE_DECIDED : LINE_DONE;
@@ -4822,12 +4822,16 @@ void hsync_record_line_state (int lineno, enum nln_how how, int changed)
                break;
        case nln_upper_black_always:
                *state = LINE_DECIDED;
-               state[-1] = LINE_BLACK;
+               if (lineno > 0) {
+                       state[-1] = LINE_BLACK;
+               }
                break;
        case nln_upper_black:
                changed |= state[0] != LINE_DONE;
                *state = changed ? LINE_DECIDED : LINE_DONE;
-               state[-1] = LINE_DONE;
+               if (lineno > 0) {
+                       state[-1] = LINE_DONE;
+               }
                break;
        }
 }