net-im/sayaka: unbreak build with vala 0.36

checking SixelConverter.vala and objdir/SixelConverter.c .. SixelConverter.vala:93.23-93.23: error: The type name `i' could not be found

			uint8 R = (uint8)((i     ) & 0x01) * 255;
			                   ^

SixelConverter.vala:134.23-134.23: error: The type name `i' could not be found

			uint8 R = (uint8)((i     ) & 0x01);
			                   ^

SixelConverter.vala:156.30-156.30: error: The type name `i' could not be found

			Palette[i, 2] = (uint8)(((i     ) & 0x03) * 255 / 3);
			                          ^

Compilation failed: 3 error(s), 0 warning(s)

PR: 222028
Submitted by: cpm
Approved by: IWAMOTO Kouichi <sue@iwmt.org> (maintainer timeout, 16 days)