Fix possible issues were font is not available.

SergioEstevao · SergioEstevao · commit 7eddd3733a4e · 2019-10-09T10:15:06.000+01:00
diff --git a/Aztec/Classes/TextKit/LayoutManager.swift b/Aztec/Classes/TextKit/LayoutManager.swift
@@ -317,7 +317,11 @@ private extension LayoutManager {
         traits.remove(.traitBold)
         traits.remove(.traitItalic)
 
-        let descriptor = font.fontDescriptor.withSymbolicTraits(traits)
-        return UIFont(descriptor: descriptor!, size: font.pointSize)
+        if let descriptor = font.fontDescriptor.withSymbolicTraits(traits) {
+            return UIFont(descriptor: descriptor, size: font.pointSize)
+        } else {
+            // Don't touch the font if we cannot remove the symbolic traits.
+            return font
+        }
     }
 }

Original file line number	Diff line number	Diff line change
`@@ -317,7 +317,11 @@ private extension LayoutManager {`
`317`	`317`	`traits.remove(.traitBold)`
`318`	`318`	`traits.remove(.traitItalic)`
`319`	`319`
`320`		`- let descriptor = font.fontDescriptor.withSymbolicTraits(traits)`
`321`		`- return UIFont(descriptor: descriptor!, size: font.pointSize)`
	`320`	`+ if let descriptor = font.fontDescriptor.withSymbolicTraits(traits) {`
	`321`	`+ return UIFont(descriptor: descriptor, size: font.pointSize)`
	`322`	`+ } else {`
	`323`	`+ // Don't touch the font if we cannot remove the symbolic traits.`
	`324`	`+ return font`
	`325`	`+ }`
`322`	`326`	`}`
`323`	`327`	`}`