Small set_linesize fixes

Author: aatle

docs/reST/ref/font.rst

@@ -514,10 +514,12 @@ solves no longer exists, it will likely be removed in the future.
    .. method:: set_linesize
 
       | :sl:`set the line space of the font text`
-      | :sg:`set_linesize(linesize) -> int`
+      | :sg:`set_linesize(linesize) -> None`
 
-        Set the height in pixels for a line of text with the font. When rendering
-        multiple lines of text this refers to the amount of space between lines.
+      Set the height in pixels for a line of text with the font. When rendering
+      multiple lines of text this refers to the amount of space between lines.
+
+      .. versionadded:: 2.5.4
 
       .. ## Font.set_linesize ##
 
@@ -534,7 +536,7 @@ solves no longer exists, it will likely be removed in the future.
    .. method:: set_point_size
 
       | :sl:`set the point size of the font`
-      | :sg:`set_point_size(size, /) -> int`
+      | :sg:`set_point_size(size, /) -> None`
 
       Sets the point size of the font, which is the value that was used to
       initialize this font.

src_c/font.c

@@ -235,12 +235,18 @@ font_set_linesize(PyObject *self, PyObject *arg)
 
 #if SDL_TTF_VERSION_ATLEAST(2, 24, 0)
     TTF_Font *font = PyFont_AsFont(self);
+
+    if (!PyLong_Check(arg)) {
+        return RAISE(PyExc_TypeError, "linesize must be an integer");
+    }
     int linesize = PyLong_AsLong(arg);
-    if (PyErr_Occurred())
+    if (linesize == -1 && PyErr_Occurred()) {
         return NULL;
+    }
 
-    if (linesize < 0)
+    if (linesize < 0) {
         return RAISE(PyExc_ValueError, "linesize must be >= 0");
+    }
 
     TTF_SetFontLineSkip(font, linesize);