As the title says, I've removed some unnecessary "else return" statements, and added some guard clauses so we don't have to go another level of indentation in the code.
FIX Emscripten JS formatting in VS IDE (thanks Moros)
+"Headless" Mode
+DrawLineDecal()
+Mouse Button Constants
+Move Constructor for olc::Renderable
+Polar/Cartesian conversion for v2d_generic
+DrawRotatedStringDecal()/DrawRotatedStringPropDecal() (thanks Oso-Grande/Sopadeoso (PR #209))
=Using olc::Renderable for layer surface
+Major Mac and GLUT Update (thanks Mumflr)
Fix PixelLerp() - oops my bad, lerped the wrong way :P
Fix "Shader" support for strings - thanks Megarev for crying about it
Fix GetTextSizeProp() - Height was just plain wrong...
+vec2d operator overloads (element wise *=, /=)
+vec2d comparison operators... :| yup... hmmmm...
+vec2d ceil(), floor(), min(), max() functions - surprising how often I do it manually
+DrawExplicitDecal(... uint32_t elements) - complete control over convex polygons and lines
+DrawPolygonDecal() - to keep Bispoo happy, required significant rewrite of EVERYTHING, but hey ho
+Complete rewrite of decal renderer
+OpenGL 3.3 Renderer (also supports Raspberry Pi)
+PGEX Break-In Hooks - with a push from Dandistine
+Wireframe Decal Mode - For debug overlays
Fix olc::Renderable Image load error - Thanks MaGetzUb & Zij-IT for finding and moaning about it
Fix file rejection in image loaders when using resource packs
Tidied Compiler defines per platform - Thanks slavka
+Pedant fixes, const correctness in parts
+DecalModes - Normal, Additive, Multiplicative blend modes
+Pixel Operators & Lerping
+Filtered Decals - If you hate pixels, then erase this file
+DrawStringProp(), GetTextSizeProp(), DrawStringPropDecal() - Draws non-monospaced font
