Removed the constructor try/catch blocks from the gui examples

since they don't always compile in visual studio 7.1 and they
would probably confuse most people anyway.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402651

examples/bayes_net_gui_ex.cpp

@@ -171,7 +171,7 @@ int WINAPI WinMain (HINSTANCE, HINSTANCE, PSTR cmds, int)
 
 main_window::
 main_window(
-) try : 
+) : 
     color_non_evidence(0,0,0),
     color_default_bg(255,255,255),
     color_evidence(100,200,100),
@@ -261,7 +261,7 @@ main_window(
     // to all arrange themselves correctly in our window.
     no_node_selected();
     on_window_resized();
-} catch (...) { close_window(); } // make sure close_window() is called if something throws 
+} 
 
 // ----------------------------------------------------------------------------------------
 

examples/gui_api_ex.cpp

@@ -100,7 +100,7 @@ class win : public drawable_window
     */
 public:
     win(
-    ) try :
+    ) :
         c(*this),
         b(*this),
         cb(*this,rectangle(100,100,200,200),0,0,255), // the color_box will be blue and 101 pixels wide and tall
@@ -144,7 +144,7 @@ public:
 
         set_title("dlib gui example");
         show();
-    } catch (...) { close_window(); } // make sure close window is called if something throws 
+    } 
 
     ~win(
     )

examples/image_ex.cpp

@@ -33,7 +33,7 @@ public:
     template <typename image_type>
     win(
         const image_type& img
-    ) try :
+    ) :
         gui_img(*this)
     {
         // set the size of this window to match the size of the input image
@@ -46,7 +46,7 @@ public:
 
         // show this window on the screen
         show();
-    } catch (...) { close_window(); } // make sure close_window() is called if something throws
+    } 
 
     ~win(
     )