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--- driftnet-0.1.6-20040426cvs/png.c	2003-08-25 08:23:43.000000000 -0400
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+++ driftnet-0.1.6-20040426cvs-new/png.c	2012-07-22 18:04:31.645250349 -0400
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@@ -104,7 +104,7 @@
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     if (color_type == PNG_COLOR_TYPE_GRAY ||
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         color_type == PNG_COLOR_TYPE_GRAY_ALPHA) {
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         if (bit_depth < 8) {
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-            png_set_gray_1_2_4_to_8(png_ptr);
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+	    png_set_expand_gray_1_2_4_to_8(png_ptr);
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         }
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         png_set_gray_to_rgb(png_ptr);
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     }