gl_utils.h: fix compil issue on Windows

__WINDOWS__ is defined in wxWidgets.
the right preprocessor symbol is _WIN32 for Windows 32/64 bits

include/gl_utils.h

@@ -24,7 +24,7 @@
 #ifndef GL_UTILS_H
 #define GL_UTILS_H
 
-#ifndef __WINDOWS__
+#ifndef _WIN32
 #include <GL/glxew.h>
 #endif
 
@@ -42,7 +42,7 @@ public:
     {
         /// This routine is written for Linux only.  The equivalent functions under Windows would
         /// include <wglext.h> and call wglSwapIntervalEXT
-    #ifndef __WINDOWS__
+    #ifndef _WIN32
         Display *dpy = glXGetCurrentDisplay();
         GLXDrawable drawable = glXGetCurrentDrawable();
 

pcbnew/class_pad.cpp

@@ -342,7 +342,8 @@ void D_PAD::BuildEffectiveShapes() const
     //
     m_effectiveBoundingRadius = calcBoundingRadius();
 
-    m_effectiveBoundingBox = EDA_RECT();        // reset to prepare for merging
+    // reset the bbox to uninitialized state to prepare for merging
+    m_effectiveBoundingBox = EDA_RECT();
 
     for( const std::shared_ptr<SHAPE>& shape : m_effectiveShapes )
     {
@@ -350,7 +351,6 @@ void D_PAD::BuildEffectiveShapes() const
         m_effectiveBoundingBox.Merge( EDA_RECT( (wxPoint) r.GetOrigin(),
                                       wxSize( r.GetWidth(), r.GetHeight() ) ) );
     }
-
     // Hole shape
     //
     wxSize  half_size = m_Drill / 2;