Fix integer division & uninitialized alignment

include/widgets.h

@@ -8,6 +8,8 @@
 
 enum class Alignment { LEFT, RIGHT, CENTER };
 struct PositionInfo {
+  PositionInfo();
+
   int x;
   int y;
   Alignment align;

src/widgets.cpp

@@ -7,13 +7,15 @@
 
 #include <stdexcept>
 
+PositionInfo::PositionInfo() : x{0}, y{0}, align{Alignment::LEFT} {}
+
 Widget::Widget(SDL_Renderer* renderer) : renderer{renderer}, rect{0, 0, 0, 0} {}
 
 Widget::~Widget() {}
 
 void Widget::set_width(int width, bool preserve_aspect_ratio) {
   if (preserve_aspect_ratio) {
-    float scale = width / rect.w;
+    float scale = ((float)width) / rect.w;
     rect.h = round(rect.h * scale);
   }
   rect.w = width;