Added short comments.

src/tools/cuebreakpoints.c

@@ -28,6 +28,7 @@ char *progname;
  */
 enum GapMode {APPEND, PREPEND, SPLIT};
 
+/* Print usage information and exit */
 void usage (int status)
 {
 	if (0 == status) {
@@ -48,6 +49,7 @@ void usage (int status)
 	exit (status);
 }
 
+/* Print version information and exit */
 void version ()
 {
 	printf("%s\n", PACKAGE_STRING);

src/tools/cueconvert.c

@@ -19,6 +19,7 @@
 
 char *progname;
 
+/* Print usage information and exit */
 void usage (int status)
 {
 	if (0 == status) {
@@ -37,6 +38,7 @@ void usage (int status)
 	exit (status);
 }
 
+/* Print version information and exit */
 void version ()
 {
 	printf("%s\n", PACKAGE_STRING);

src/tools/cueprint.c

@@ -61,6 +61,7 @@ typedef union {
 
 char *progname;
 
+/* Print usage information and exit */
 void usage (int status)
 {
 	if (0 == status) {
@@ -86,6 +87,7 @@ void usage (int status)
 	exit (status);
 }
 
+/* Print version information and exit */
 void version ()
 {
 	printf("%s\n", PACKAGE_STRING);