clean up free()s

src/CanvasRenderingContext2d.cc

@@ -142,9 +142,7 @@ Context2d::Context2d(Canvas *canvas) {
  */
 
 Context2d::~Context2d() {
-  while(stateno >= 0) {
-    free(states[stateno--]);
-  }
+  while(stateno >= 0) free(states[stateno--]);
   cairo_destroy(_context);
 }
 
@@ -393,7 +391,8 @@ Context2d::blur(cairo_surface_t *surface, int radius) {
           }
       }
   }
-  free( precalc );
+
+  free(precalc);
 }
 
 /*

src/Image.cc

@@ -257,8 +257,8 @@ Image::~Image() {
     cairo_surface_destroy(_surface);
   }
 
-  if (_data) free(_data);
-  if (filename) free(filename);
+  free(_data);
+  free(filename);
 }
 
 /*