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-rw-r--r--engines/gob/video.cpp13
1 files changed, 8 insertions, 5 deletions
diff --git a/engines/gob/video.cpp b/engines/gob/video.cpp
index 84aca62cc5..28550b2f56 100644
--- a/engines/gob/video.cpp
+++ b/engines/gob/video.cpp
@@ -110,17 +110,20 @@ void Font::drawLetter(Surface &surf, uint8 c, uint16 x, uint16 y,
nWidth >>= 3;
- for (int i = 0; i < _itemHeight; i++) {
+ for (int i = 0; (i < _itemHeight) && dst.isValid(); i++) {
int width = _itemWidth;
for (int k = 0; k < nWidth; k++) {
data = *src++;
for (int j = 0; j < MIN(8, width); j++) {
- if (data & 0x80)
- dst.set(color1);
- else if (!transp)
- dst.set(color2);
+
+ if (dst.isValid()) {
+ if (data & 0x80)
+ dst.set(color1);
+ else if (!transp)
+ dst.set(color2);
+ }
dst++;
data <<= 1;