fix debug build with vs2017

engine/font.h

@@ -41,7 +41,7 @@ public:
     int font_array_count = 0;
     GLuint font_buffers[2] = {0, 0};
     kFont font_id;
-    glm::vec2 bb;
+    glm::vec2 bb = { 0, 0 };
     bool create();
     void update(kFont id, const char* text);
     void draw();