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-rw-r--r--src/gfx.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/gfx.cpp b/src/gfx.cpp
index 7fad4f15b..6253238a3 100644
--- a/src/gfx.cpp
+++ b/src/gfx.cpp
@@ -1699,7 +1699,7 @@ void SetDirtyBlocks(int left, int top, int right, int bottom)
do {
int i = width;
- do b[--i] = 0xFF; while (i);
+ do b[--i] = 0xFF; while (i != 0);
b += _dirty_bytes_per_line;
} while (--height != 0);