Tidy

- Kill unused vars in wrlib
- Add missing initializers to defaults.c:staticOptionList
- Re-format it slightly
- Kill some dead code
- Kill stupid "if (const op var)"

wrlib/png.c

@@ -31,7 +31,7 @@
 
 #include "wraster.h"
 
-RImage *RLoadPNG(RContext * context, char *file, int index)
+RImage *RLoadPNG(RContext * context, char *file)
 {
 	char *tmp;
 	RImage *image = NULL;