fix build on Mac

gfx/src/mac/nsImageMac.cpp

@@ -325,7 +325,7 @@ PRUint16                red,green,blue,*cur16;
 
 //------------------------------------------------------------
 
-nsresult nsImageMac::Optimize(nsDrawingSurface aDrawingSurface)
+nsresult nsImageMac::Optimize(nsIDeviceContext* aContext)
 {
 /*PRInt16 i;
 

gfx/src/mac/nsImageMac.h

@@ -44,7 +44,7 @@ public:
   virtual void ImageUpdated(nsIDeviceContext *aContext, PRUint8 aFlags, nsRect *aUpdateRect);
   virtual nsresult    Init(PRInt32 aWidth, PRInt32 aHeight, PRInt32 aDepth, nsMaskRequirements aMaskRequirements);
   virtual PRBool      IsOptimized()       { return false; }
-  virtual nsresult    Optimize(nsDrawingSurface aSurface);
+  virtual nsresult    Optimize(nsIDeviceContext* aContext);
   virtual PRUint8*    GetAlphaBits()      { return nsnull; }
   virtual PRInt32     GetAlphaWidth()   { return 0;}
   virtual PRInt32     GetAlphaHeight()   {return 0;}

view/src/nsView.cpp

@@ -1048,7 +1048,7 @@ void nsView :: List(FILE* out, PRInt32 aIndent) const
     kid->List(out, aIndent + 1);
     kid = kid->GetNextSibling();
   }
-  for (i = aIndent; --i >= 0; ) fputs("  ", out);
+  for (PRInt32 i = aIndent; --i >= 0; ) fputs("  ", out);
   fputs(">\n", out);
 }