X-Git-Url: http://nitlanguage.org

diff --git a/lib/bitmap/bitmap.nit b/lib/bitmap/bitmap.nit
index 3110265..3c66f07 100644
--- a/lib/bitmap/bitmap.nit
+++ b/lib/bitmap/bitmap.nit
@@ -130,7 +130,8 @@ class Bitmap
 		# =============== Bitmap header ================
 		for x in [0..13] do
 			var b = fileReader.read_byte
-			bitmap_header[x] = b.to_i
+			if b < 0 then return
+			bitmap_header[x] = b
 		end
 		self.file_size = get_value(bitmap_header.subarray(2, 4))
 		self.data_offset = get_value(bitmap_header.subarray(10, 4))
@@ -138,7 +139,8 @@ class Bitmap
 		# =============== DIB header ================
 		for x in [0..39] do
 			var b = fileReader.read_byte
-			dib_header[x] = b.to_i
+			if b < 0 then return
+			dib_header[x] = b
 		end
 		var dib_size = get_value(dib_header.subarray(0, 4))
 		# only support BITMAPINFOHEADER