[1.25.3] espeak_SetVoiceByName() didn't set current_voice correctly when voice is specified by filename.

Added ResetLetterBits() to clear data before using SetLetterBits().


git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@19 d46cf337-b52f-0410-862d-fd96e6ae7743

dictsource/el_rules

@@ -6,7 +6,8 @@
 // Α α, Β β, Γ γ, Δ δ, Ε ε, Ζ ζ, Η η, Θ θ, Ι ι, Κ κ, Λ λ, Μ μ, Ν ν, Ξ ξ,
 // Ο ο, Π π, Ρ ρ, Σ σ ς (word-final form), Τ τ, Υ υ, Φ φ, Χ χ, Ψ ψ, Ω ω.
 
-// Y:  ε η ι υ  (+tonos variants, front vowels).
+// Letter group B:   θ κ ξ π ς σ τ φ χ  (voiceless consonants)
+// Letter group Y:   ε η ι υ  έ ή ί ύ  (front vowels).
 
 
 .group α
@@ -43,6 +44,7 @@
            δ        D
            δ (δ
 
+
 .group ε
            ε        e
            ει       i