fix a severe bug in vector extension logic

include/justui/jpainted.h

@@ -31,7 +31,7 @@
    an integer or a pointer (essentially).
 
      void draw_value(int x, int y, uint32_t *value) {
-     	dprint(x, y, "%08X", *value);
+       dprint(x, y, "%08X", *value);
      }
      uint32_t my_value;
      jpainted *widget = jpainted_create(draw_value, &my_value, 30, 8, parent);

src/jlabel.c

@@ -28,6 +28,7 @@ jlabel *jlabel_create(char const *text, void *parent)
 	l->color = C_BLACK;
 	l->font = NULL;
 
+	l->wrap_mode = J_WRAP_NONE;
 	l->text = text;
 	l->owns_text = false;
 

src/vec.c

@@ -24,21 +24,22 @@ bool vec_add(vec_t *v, size_t n)
 		/* Allocate either size/2 new elements or 4 elements */
 		size_t ext = max(v->size / 2, 4);
 		/* Make sure that no more than 255 free elements will remain */
-		if(v->size + v->free + ext > n + 255)
-			ext = (n + 255) - (v->size + v->free);
+		if(v->free + ext > n + 255)
+			ext = (n + 255) - v->free;
 
 		size_t newsize = v->size + v->free + ext;
 		void *newdata = realloc(v->data, newsize * v->elsize);
 		if(!newdata) return false;
 
 		v->data = newdata;
-		v->free = newsize - n;
+		v->free = newsize - v->size - n;
+		v->size += n;
 	}
 	else {
 		v->free -= n;
+		v->size += n;
 	}
 
-	v->size += n;
 	return true;
 }