Rover: sailboat class formatting fixes

move constructor to top of sailboat.h
move var_info to be the last public declaration
remove some spaces

APMrover2/sailboat.h

@@ -20,8 +20,8 @@ class Sailboat
 {
 public:
 
-    // var_info for holding Parameter information
+    // constructor
-    static const struct AP_Param::GroupInfo var_info[];
+    Sailboat();
 
     // enabled
     bool sail_enabled() const { return enable > 0;}
@@ -29,9 +29,6 @@ public:
     // true if sailboat navigation (aka tacking) is enabled
     bool nav_enabled() const;
 
-    // constructor
-    Sailboat();
-
     // setup
     void init();
 
@@ -76,6 +73,9 @@ public:
         FORCE_MOTOR  = 2
     } throttle_state;
 
+    // var_info for holding Parameter information
+    static const struct AP_Param::GroupInfo var_info[];
+
 private:
 
     // Check if we should assist with throttle