X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/68379eaf0ae64d105f8244b1db83e793f7dd83b0..b9efe021b554fa3967d1442cf758435c5cd5ae8f:/src/common/dcbase.cpp

diff --git a/src/common/dcbase.cpp b/src/common/dcbase.cpp
index 10c928e505..9c9ba611e7 100644
--- a/src/common/dcbase.cpp
+++ b/src/common/dcbase.cpp
@@ -30,8 +30,6 @@
 
 #include "wx/dc.h"
 
-#include <math.h>
-
 // bool wxDCBase::sm_cacheing = false;
 
 // ============================================================================
@@ -316,6 +314,10 @@ void wxDCBase::DoDrawSpline( wxList *points )
     double           x1, y1, x2, y2;
 
     wxList::compatibility_iterator node = points->GetFirst();
+    if (node == wxList::compatibility_iterator())
+        // empty list
+        return;
+
     p = (wxPoint *)node->GetData();
 
     x1 = p->x;
@@ -371,7 +373,7 @@ void wxDCBase::DoDrawSpline( wxList *points )
 
 
 // Each element of the widths array will be the width of the string up to and
-// including the coresponding character in text.  This is the generic
+// including the corresponding character in text.  This is the generic
 // implementation, the port-specific classes should do this with native APIs
 // if available and if faster.  Note: pango_layout_index_to_pos is much slower
 // than calling GetTextExtent!!
@@ -762,7 +764,7 @@ void wxDCBase::Rotate( wxList* points, double angle, wxPoint center )
 {
     if( angle != 0.0 )
     {
-        double pi(3.1415926536);
+        double pi(M_PI);
         double dSinA = -sin(angle*2.0*pi/360.0);
         double dCosA = cos(angle*2.0*pi/360.0);
         for ( wxNode* node = points->First(); node; node = node->Next() )
@@ -790,7 +792,7 @@ void wxDCBase::CalculateEllipticPoints( wxList* points,
                                         wxCoord w, wxCoord h,
                                         double sa, double ea )
 {
-    double pi = 3.1415926535;
+    double pi = M_PI;
     double sar = 0;
     double ear = 0;
     int xsa = 0;