Do not unmask "Invalid" FP exceptions

This commit removes code that enables "Invalid" FP exceptions. Its
intent is unclear since it predates the git history of OpenSpades, but
it's probably for debugging.

Fixes #784.

Sources/Draw/GLRadiosityRenderer.cpp

@@ -45,16 +45,6 @@ namespace spades {
 			void Run() override {
 				SPADES_MARK_FUNCTION();
 
-// Enable FPE
-#if 1
-#ifdef __APPLE__
-				short fpflags = 0x1332; // Default FP flags, change this however you want.
-				__asm__("fnclex\n\tfldcw %0\n\t" : "=m"(fpflags));
-
-				_MM_SET_EXCEPTION_MASK(_MM_GET_EXCEPTION_MASK() & ~_MM_MASK_INVALID);
-#endif
-#endif
-
 				renderer->UpdateDirtyChunks();
 
 				done = true;