fixed handling of --with-opengl=auto (default value) for Mac/MSW (it behaved as --without-opengl before)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61272 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure

@@ -33400,8 +33400,6 @@ echo "$as_me: WARNING: OpenGL libraries not available, disabling support for Ope
                 wxUSE_OPENGL=no
                 USE_OPENGL=0
             fi
-        else
-                        wxUSE_OPENGL=yes
         fi
     else
         { echo "$as_me:$LINENO: WARNING: wxGLCanvas not implemented for this port, library will be compiled without it." >&5
@@ -33409,6 +33407,10 @@ echo "$as_me: WARNING: wxGLCanvas not implemented for this port, library will be
         wxUSE_OPENGL="no"
     fi
 
+    if test "$wxUSE_OPENGL" = "auto"; then
+                                wxUSE_OPENGL=yes
+    fi
+
     if test "$wxUSE_OPENGL" = "yes"; then
         USE_OPENGL=1
         cat >>confdefs.h <<\_ACEOF