Freetype failure / exit crashes the core

[Charles Goodwin]

If the core encounters a freetype problem, it hangs the core. Perhaps there needs to be some kind of recovery process (mark the font as bad and restart freetype?) or, worst case, exit gracefully.

When attempting to render a font that our inbuilt freetype binary does not like, this error gets thrown:

FT_Render_Glyph(face->glyph, FT_RENDER_MODE_NORMAL) failed

Then returning to a normal font throws this:

Exception in thread "main" java.lang.Error: Freetype exited 1
 at org.vexi.graphics.Font.rtCheck(Font.java:144)
 at org.vexi.graphics.Font.loadFontByteStream(Font.java:168)
 at org.vexi.graphics.Font.renderGlyph(Font.java:175)
 at org.vexi.graphics.Font.access$1(Font.java:172)
 at org.vexi.graphics.Font$Glyph.render(Font.java:51)
 at org.vexi.graphics.Font.rasterizeGlyphs(Font.java:96)
 at org.vexi.graphics.Font.textsize(Font.java:107)
 at org.vexi.graphics.Font.textwidth(Font.java:105)
 at org.vexi.core.Text.calculateDimensions(Text.java:113)
 at org.vexi.core.Text.setStream(Text.java:96)
 at org.vexi.core.Box.put(Box.java:1217)
 at org.ibex.js.Interpreter.run(Interpreter.java:303)
 at org.ibex.js.Interpreter.run(Interpreter.java:68)
 at org.ibex.js.Thread$Faction.runAfterPut(Thread.java:102)
 at org.ibex.js.JS$Obj.justTriggerTraps(JS.java:237)
 at org.vexi.core.Box.propagateEvent(Box.java:1032)
 at org.vexi.core.Box.propagateEvent(Box.java:1026)
 at org.vexi.core.Box.propagateEvent(Box.java:1026)
 at org.vexi.core.Box.propagateEvent(Box.java:1018)
 at org.vexi.core.Box.propagateEvent(Box.java:1026)
 at org.vexi.core.Box.propagateEvent(Box.java:1026)
 at org.vexi.core.Box.propagateEvent(Box.java:1026)
 at org.vexi.core.Box.propagateEvent(Box.java:1026)
 at org.vexi.core.Box.propagateEvent(Box.java:1026)
 at org.vexi.core.Box.propagateEvent(Box.java:1026)
 at org.vexi.core.Box.propagateEvent(Box.java:1018)
 at org.vexi.core.Box.propagateEvent(Box.java:1026)
 at org.vexi.core.Box.tryPropagateEvent(Box.java:1001)
 at org.vexi.core.Surface$Message.run(Surface.java:485)
 at org.ibex.js.Scheduler.defaultRun(Scheduler.java:81)
 at org.ibex.js.Scheduler.run(Scheduler.java:59)
 at org.ibex.js.Scheduler.init(Scheduler.java:39)
 at org.vexi.core.Main.start(Main.java:197)
 at org.vexi.core.Main.main(Main.java:86)