[librsvg] font_size_from_values(): Inline the Em/Ex cases where it would call hand_normalize()

[Federico Mena Quintero <federico src gnome org>]

commit 70a4539485cc840ea02aae86396d47b0cd5eed5e
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Feb 19 13:09:34 2019 -0600

    font_size_from_values(): Inline the Em/Ex cases where it would call hand_normalize()
    
    Let's see if we can remove hand_normalize() for good...

 rsvg_internals/src/length.rs | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/rsvg_internals/src/length.rs b/rsvg_internals/src/length.rs
index 496ef9ef..a6c1d853 100644
--- a/rsvg_internals/src/length.rs
+++ b/rsvg_internals/src/length.rs
@@ -342,10 +342,11 @@ fn font_size_from_values(values: &ComputedValues, params: &ViewParams) -> f64 {
 
         LengthUnit::Px => v.length,
 
-        LengthUnit::Em | LengthUnit::Ex => {
-            // This is the same default as used in NodeSvg::get_size()
-            v.hand_normalize(0.0, 0.0, 12.0)
-        }
+        // This is the same default as used in NodeSvg::get_size()
+        LengthUnit::Em => v.length * 12.0,
+
+        // This is the same default as used in NodeSvg::get_size()
+        LengthUnit::Ex => v.length * 12.0 / 2.0,
 
         // FontSize always is a LengthDir::Both, per properties.rs
         LengthUnit::In => v.length * LengthDir::Both.scaling_factor(params.dpi_x, params.dpi_y),