Change song comment command to c

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>

Changelog

@@ -2,7 +2,7 @@ Stable versions
 ---------------
 
 4.0.8 ():
-	- Add command M to display song message
+	- Add command c to display song comment
 	- Fix ignored amplify option (by Dennis Lindroos)
 	- Fix Win64 compatibility (by Ozkan Sezer)
 	- Fix screen corruption with large number of rows

README

@@ -42,6 +42,7 @@ The following single key commands can be used during the playback:
             i         =>  display combined instrument/sample list
             I         =>  display instrument list
             S         =>  display sample list
+            c         =>  display comment, if any
             <         =>  jump to previous sequence
             >         =>  jump to next sequence
 

src/commands.c

@@ -219,10 +219,14 @@ void read_command(xmp_context handle, struct xmp_module_info *mi, struct control
 	case 'i':
 	case 'I':
 	case 'S':
-	case 'M':
 	case 'm':
 		ctl->display = cmd;
 		break;
+	case 'c':
+		if (mi->comment != NULL) {
+			ctl->display = cmd;
+		}
+		break;
 	case '>':
 		change_sequence(handle, mi, ctl, 1);
 		break;

src/info.c

@@ -30,11 +30,11 @@ void info_help(void)
 "      Z         Display current sequence\n"
 "      z         Toggle subsong explorer mode\n"
 "      l         Toggle loop mode\n"
-"      M         Display message (if any)\n"
 "      m         Display module information\n"
 "      i         Display combined instrument/sample list\n"
 "      I         Display instrument list\n"
 "      S         Display sample list\n"
+"      c         Display comment, if any\n"
 "      <         Play previous sequence\n"
 "      >         Play next sequence\n"
 );
@@ -326,8 +326,6 @@ void info_comment(struct xmp_module_info *mi)
 			} while (*c++ != '\n');
 		}		
 		report("\n\n");
-	} else {
-		report("<no message>\n\n");
 	}
 }
 

src/main.c

@@ -117,7 +117,7 @@ static void show_info(int what, struct xmp_module_info *mi)
 	case 'S':
 		info_samples(mi);
 		break;
-	case 'M':
+	case 'c':
 		info_comment(mi);
 		break;
 	case 'm':

src/xmp.1

@@ -209,8 +209,6 @@ Display current sequence\&.
 Toggle subsong explorer mode\&.
 .IP "\fBl\fP" 
 Toggle module/sequence looping\&.
-.IP "\fBM\fP" 
-Display message\&, if any\&.
 .IP "\fBm\fP" 
 Display module information\&.
 .IP "\fBi\fP" 
@@ -219,6 +217,8 @@ Display combined instrument/sample list\&.
 Display instrument list\&.
 .IP "\fBS\fP" 
 Display sample list\&.
+.IP "\fBc\fP" 
+Display comment\&, if any\&.
 .IP "\fB<\fP" 
 Change to previous sequence (subsong)\&.
 .IP "\fB>\fP"