Remove unreachable encoder states

Conflicts:
	heatshrink_encoder.c

enc_sm.dot

@@ -26,13 +26,10 @@ digraph {
 
         yield_tag_bit->yield_tag_bit [label="poll(), full buf", color="red"]
         yield_tag_bit->yield_literal [label="poll(), literal", color="red"]
-        yield_tag_bit->yield_br_index [label="poll(), no literal", color="red"]
-        yield_tag_bit->flush_bits [label="finishing, no literal"]
+        yield_tag_bit->yield_br_index [label="poll(), match", color="red"]
 
         yield_literal->yield_literal [label="poll(), full buf", color="red"]
-        yield_literal->search [label="poll(), no match", color="red"]
-        yield_literal->yield_tag_bit [label="poll(), match", color="red"]
-        yield_literal->flush_bits [label="poll(), final literal", color="red"]
+        yield_literal->search [label="done"]
 
         yield_br_index->yield_br_index [label="poll(), full buf", color="red"]
         yield_br_index->yield_br_length [label="poll()", color="red"]
@@ -40,8 +37,7 @@ digraph {
         yield_br_length->yield_br_length [label="poll(), full buf", color="red"]
         yield_br_length->search [label="done"]
 
-        save_backlog->flush_bits [label="finishing, no literal"]
-        save_backlog->yield_tag_bit [label="finishing, literal"]
+        save_backlog->flush_bits [label="finishing"]
         save_backlog->not_full [label="expect more input"]
 
         flush_bits->flush_bits [label="poll(), full buf", color="red"]

heatshrink_encoder.c

@@ -62,7 +62,6 @@ static int can_take_byte(output_info *oi);
 static int is_finishing(heatshrink_encoder *hse);
 static int on_final_literal(heatshrink_encoder *hse);
 static void save_backlog(heatshrink_encoder *hse);
-static int has_literal(heatshrink_encoder *hse);
 
 /* Push COUNT (max 8) bits to the output buffer, which has room. */
 static void push_bits(heatshrink_encoder *hse, uint8_t count, uint8_t bits,
@@ -292,7 +291,6 @@ static HSE_state st_step_search(heatshrink_encoder *hse) {
     if (match_pos == MATCH_NOT_FOUND) {
         LOG("ss Match not found\n");
         hse->match_scan_index++;
-        hse->flags |= FLAG_HAS_LITERAL;
         hse->match_length = 0;
         return HSES_YIELD_TAG_BIT;
     } else {
@@ -326,9 +324,7 @@ static HSE_state st_yield_literal(heatshrink_encoder *hse,
         output_info *oi) {
     if (can_take_byte(oi)) {
         push_literal_byte(hse, oi);
-        hse->flags &= ~FLAG_HAS_LITERAL;
-        if (on_final_literal(hse)) { return HSES_FLUSH_BITS; }
-        return hse->match_length > 0 ? HSES_YIELD_TAG_BIT : HSES_SEARCH;
+        return HSES_SEARCH;
     } else {
         return HSES_YIELD_LITERAL;
     }
@@ -368,13 +364,7 @@ static HSE_state st_yield_br_length(heatshrink_encoder *hse,
 
 static HSE_state st_save_backlog(heatshrink_encoder *hse) {
     if (is_finishing(hse)) {
-        /* copy remaining literal (if necessary) */
-        if (has_literal(hse)) {
-            hse->flags |= FLAG_ON_FINAL_LITERAL;
-            return HSES_YIELD_TAG_BIT;
-        } else {
-            return HSES_FLUSH_BITS;
-        }
+        return HSES_FLUSH_BITS;
     } else {
         LOG("-- saving backlog\n");
         save_backlog(hse);