code cleanup: move lookupwchar2 to readclause.c

It's used only in readclause.c

TODO: Rename so the meaning of the function is easier to understand.

src/libespeak-ng/readclause.c

 	memset(p, ' ', utf8_in(&c, p));
 }
 
+static int lookupwchar2(const unsigned short *list, int c)
+{
+	// Replace character c by another character.
+	// Returns 0 = not found, 1 = delete character
+
+	int ix;
+
+	for (ix = 0; list[ix] != 0; ix += 2) {
+		if (list[ix] == c)
+			return list[ix+1];
+	}
+	return 0;
+}
+
+
 int ReadClause(Translator *tr, char *buf, short *charix, int *charix_top, int n_buf, int *tone_type, char *voice_change)
 {
 	/* Find the end of the current clause.

src/libespeak-ng/translate.c

 	return 0;
 }
 
-int lookupwchar2(const unsigned short *list, int c)
-{
-	// Replace character c by another character.
-	// Returns 0 = not found, 1 = delete character
-
-	int ix;
-
-	for (ix = 0; list[ix] != 0; ix += 2) {
-		if (list[ix] == c)
-			return list[ix+1];
-	}
-	return 0;
-}
-
 int IsBracket(int c)
 {
 	if ((c >= 0x2014) && (c <= 0x201f))

src/libespeak-ng/translate.h

 int utf8_nbytes(const char *buf);
 
 int lookupwchar(const unsigned short *list, int c);
-int lookupwchar2(const unsigned short *list, int c);
 char *strchr_w(const char *s, int c);
 int IsBracket(int c);
 void InitNamedata(void);