synthK5 to synthK10 do not appear to be zeroed for unvoiced frames

[kevinjwalters]

For an unvoiced frame this code

Talkie/Talkie/talkie.cpp

Lines 125 to 140 in 7f57628

	if (!repeat) {
	// All frames use the first 4 coefficients
	synthK1 = tmsK1[getBits(5)];
	synthK2 = tmsK2[getBits(5)];
	synthK3 = tmsK3[getBits(4)];
	synthK4 = tmsK4[getBits(4)];
	if (synthPeriod) {
	// Voiced frames use 6 extra coefficients.
	synthK5 = tmsK5[getBits(4)];
	synthK6 = tmsK6[getBits(4)];
	synthK7 = tmsK7[getBits(4)];
	synthK8 = tmsK8[getBits(3)];
	synthK9 = tmsK9[getBits(3)];
	synthK10 = tmsK10[getBits(3)];
	}
	}

sets synthK1 to synthK4 but does not set synthK5 to synthK10. This leaves any values previously set so the current frame will actually inherit any set values from a previous frame.

This appears at odds with the (brief) comments in the data sheet on how it operates if I am interpreting them correctly? Page 9 says:

Unvoiced speech requires fewer filter coefficients. When Pitch = 000000, only K1-K4 are fetched from the VSM and stored in the Parameter RAM. K5-K10 are zeroed.

I've not executed this code, I've just inspected it...