[PATCH v4 2/6] win32u: Warn when ppem == 0.

[Tarcísio Ladeia de Oliveira]

From: Tarcísio Ladeia de Oliveira

Windows manages to handle this gracefully, but it may have some
unforeseen side-effects. Make it warn when ppem == 0 so it may be
logged. I'm not using ERR because compatibility-wise this should work
correctly.
---
 dlls/win32u/freetype.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dlls/win32u/freetype.c b/dlls/win32u/freetype.c
index d911039647b..3dfd8c5070f 100644
--- a/dlls/win32u/freetype.c
+++ b/dlls/win32u/freetype.c
@@ -1951,6 +1951,13 @@ static LONG calc_ppem_for_height(FT_Face ft_face, LONG height)
         ppem = 1;
     }

+    /*
+     * It's possible for EM to be 0 for some fonts, and it should be handled
+     * gracefully, but it can cause problems, so warn when it happens.
+     */
+    if(ppem == 0)
+        WARN("Font family %s with style %s and height %i has EM == 0\n", ft_face->family_name, ft_face->style_name, height);
+
     return ppem;
 }