X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/b47c832e5529dc6c632536b4665a005f0a85aec8..cc9a39576ab6edb139c9bb77d01f4118853e04d2:/src/tiff/tif_thunder.c?ds=sidebyside

diff --git a/src/tiff/tif_thunder.c b/src/tiff/tif_thunder.c
index e77e7be71f..0880795980 100644
--- a/src/tiff/tif_thunder.c
+++ b/src/tiff/tif_thunder.c
@@ -60,7 +60,7 @@ static const int threebitdeltas[8] = { 0, 1, 2, 3, 0, -3, -2, -1 };
 	if (npixels++ & 1) \
 	    *op++ |= lastpixel; \
 	else \
-	    op[0] = lastpixel << 4; \
+	    op[0] = (tidataval_t) (lastpixel << 4); \
 }
 
 static int
@@ -91,8 +91,10 @@ ThunderDecode(TIFF* tif, tidata_t op, tsize_t maxpixels)
 			} else
 				lastpixel |= lastpixel << 4;
 			npixels += n;
-			for (; n > 0; n -= 2)
-				*op++ = lastpixel;
+			if (npixels < maxpixels) {
+				for (; n > 0; n -= 2)
+					*op++ = (tidataval_t) lastpixel;
+			}
 			if (n == -1)
 				*--op &= 0xf0;
 			lastpixel &= 0xf;