Fast curve open misbehaviour when not initialized fix

src/msg/rt/src/rt_xnav_msg.msg

@@ -73,4 +73,5 @@ filecorrupt	<File is corrupt>				/error
 notcollectw	<Not collect window>				/error
 noclassgraph	<No classgraph found>				/error
 notauthorized   <Not authorized for this operation>		/error
+novalidcurve    <No valid curve found>				/error
 

xtt/lib/xtt/gtk/xtt_fast_gtk.cpp

@@ -75,6 +75,9 @@ XttFastGtk::XttFastGtk( void *parent_ctx,
 {
   char title[250];
     
+  if ( EVEN(*sts))
+    return;
+
   *sts = XNAV__SUCCESS;
 
   if ( strcmp( name, "") != 0)

xtt/lib/xtt/src/xtt_fast.cpp

@@ -140,6 +140,13 @@ XttFast::XttFast( void *parent_ctx,
     }
   }
 
+  if ( !fast_cnt) {
+    *sts = XNAV__NOVALIDCURVE;
+    free(gcd);
+    gcd = 0;
+    return;
+  }
+
   // Subscribe to object
   strcpy( attr_name, fast_name);
   strcat( attr_name, ".New");

xtt/lib/xtt/src/xtt_xnav_command.cpp

@@ -2885,6 +2885,8 @@ static int	xnav_open_func(	void		*client_data,
     pwr_tAName	pinstance_str;
     void 	*basewidget = 0;
 
+    // Command is "OPEN GRAPH"
+
     parent = ODD( dcli_get_qualifier( "/PARENT", 0, 0));
 
     if ( ODD( dcli_get_qualifier( "/FULLSCREEN", 0, 0)))
@@ -3217,6 +3219,8 @@ static int	xnav_open_func(	void		*client_data,
     pwr_tStatus sts;
     pwr_tAttrRef aref_vect[2];
     
+    // Command is "OPEN MULTIVIEW"
+
     /* Get the name qualifier */
     if ( ODD( dcli_get_qualifier( "dcli_arg2", name_str, sizeof(name_str)))) {
       if ( name_str[0] != '/')