cleanup: make spelling_stress bool and set default value

src/libespeak-ng/numbers.c

 		if ((c == phonSTRESS_P) && (n_chars > 1) && (prev != phonSWITCH)) {
 			count++;
 
-			if (tr->langopts.spelling_stress == 1) {
+			if (tr->langopts.spelling_stress) {
 				// stress on initial letter when spelling
 				if (count > 1)
 					c = phonSTRESS_3;

src/libespeak-ng/tr_languages.c

 	tr->langopts.param[LOPT_UNPRONOUNCABLE] = 's'; // don't count this character at start of word
 	tr->langopts.param[LOPT_BRACKET_PAUSE] = 4; // pause at bracket
 	tr->langopts.param[LOPT_BRACKET_PAUSE_ANNOUNCED] = 2; // pauses when announcing bracket names
+	tr->langopts.spelling_stress = false;
 	tr->langopts.max_initial_consonants = 3;
 	tr->langopts.replace_chars = NULL;
 	tr->langopts.alt_alphabet_lang = L('e', 'n');
 
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_ALLOW_SPACE | NUM_DFRACTION_2 | NUM_ORDINAL_DOT;
 		SetLetterVowel(tr, 'y');
-		tr->langopts.spelling_stress = 1;
+		tr->langopts.spelling_stress = true;
 	}
 		break;
 	case L('f', 'r'): // french
 		tr->langopts.stress_flags = S_FINAL_NO_2;
 		tr->langopts.param[LOPT_REGRESSIVE_VOICING] = 0x3;
 		tr->langopts.max_initial_consonants = 5;
-		tr->langopts.spelling_stress = 1;
+		tr->langopts.spelling_stress = true;
 		tr->langopts.accents = 1;
 
 		tr->langopts.numbers = NUM_SINGLE_STRESS | NUM_HUNDRED_AND | NUM_OMIT_1_HUNDRED | NUM_DECIMAL_COMMA | NUM_THOUS_SPACE | NUM_DFRACTION_2 | NUM_ROMAN_CAPITALS;
 		tr->langopts.max_roman = 899;
 		tr->langopts.min_roman = 1;
 		SetLetterVowel(tr, 'y');
-		tr->langopts.spelling_stress = 1;
+		tr->langopts.spelling_stress = true;
 		SetLengthMods(tr, 3); // all equal
 	}
 		break;
 		SetupTranslator(tr, stress_lengths_lv, stress_amps_lv);
 
 		tr->langopts.stress_rule = STRESSPOSN_1L;
-		tr->langopts.spelling_stress = 1;
+		tr->langopts.spelling_stress = true;
 		tr->encoding = ESPEAKNG_ENCODING_ISO_8859_4;
 		tr->langopts.max_digits = 33;
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_OMIT_1_HUNDRED | NUM_DFRACTION_4 | NUM_ORDINAL_DOT;
 		tr->langopts.stress_flags = S_FINAL_DIM_ONLY | S_FINAL_NO_2;
 		tr->langopts.param[LOPT_REGRESSIVE_VOICING] = 0x3;
 		tr->langopts.max_initial_consonants = 5;
-		tr->langopts.spelling_stress = 1;
+		tr->langopts.spelling_stress = true;
 		tr->langopts.param[LOPT_COMBINE_WORDS] = 4; // combine some prepositions with the following word
 
 		tr->langopts.numbers = NUM_OMIT_1_HUNDRED | NUM_DFRACTION_2 | NUM_ROMAN;
 
 		tr->langopts.stress_rule = STRESSPOSN_1L;
 		tr->langopts.stress_flags =  S_FINAL_DIM_ONLY | S_FINAL_NO_2;
-		tr->langopts.spelling_stress = 1;
+		tr->langopts.spelling_stress = true;
 
 		tr->letter_bits_offset = OFFSET_SINHALA;
 		memset(tr->letter_bits, 0, sizeof(tr->letter_bits));
 
 		tr->langopts.numbers = NUM_DECIMAL_COMMA | NUM_ALLOW_SPACE | NUM_SWAP_TENS | NUM_OMIT_1_HUNDRED | NUM_DFRACTION_2 | NUM_ORDINAL_DOT;
 		SetLetterVowel(tr, 'y');
-		tr->langopts.spelling_stress = 1;
+		tr->langopts.spelling_stress = true;
 		tr->langopts.intonation_group = 3; // less intonation, don't raise pitch at comma
 	}
 		break;
 
 		tr->langopts.stress_rule = STRESSPOSN_1L;
 		tr->langopts.stress_flags =  S_FINAL_DIM_ONLY | S_FINAL_NO_2; // use 'diminished' for unstressed final syllable
-		tr->langopts.spelling_stress = 1;
+		tr->langopts.spelling_stress = true;
 		tr->langopts.break_numbers = BREAK_LAKH_DV;
 
 		if (name2 == L('t', 'a')) {

src/libespeak-ng/translate.h

 	unsigned char tunes[6];
 	int long_stop;          // extra mS pause for a lengthened stop
 	char max_initial_consonants;
-	char spelling_stress;   // 0=default, 1=stress first letter
+	bool spelling_stress;
 	char tone_numbers;
 	char ideographs;      // treat as separate words
 	bool textmode;          // the meaning of FLAG_TEXTMODE is reversed (to save data when *_list file is compiled)