Idomatic change to main's argv.

src/tools/cuebreakpoints.c

@@ -120,7 +120,7 @@ int breaks (char *name, int format, int gaps)
 	return 0;
 }
 
-int main (int argc, char **argv)
+int main (int argc, char *argv[])
 {
 	int format = UNKNOWN;
 	int gaps = APPEND;

src/tools/cueconvert.c

@@ -72,7 +72,7 @@ int convert (char *iname, int iformat, char *oname, int oformat)
 	return cf_print(oname, &oformat, cd);
 }
 
-int main (int argc, char **argv)
+int main (int argc, char *argv[])
 {
 	int iformat = UNKNOWN;
 	int oformat = UNKNOWN;

src/tools/cueprint.c

@@ -415,7 +415,7 @@ void translate_escapes(char *s)
 	*write = '\0';
 }
 
-int main (int argc, char **argv)
+int main (int argc, char *argv[])
 {
 	int format = UNKNOWN;
 	int trackno = -1;		/* track number (-1 = unspecified,