Optimized some of the previous changes related to order of evaluation.

wrlib/jpeg.c

@@ -185,9 +185,9 @@ RLoadJPEG(RContext *context, char *file_name, int index)
 	    jpeg_read_scanlines(&cinfo, buffer,(JDIMENSION) 1);
 	    bptr = buffer[0];
 	    for (i=0; i<cinfo.image_width; i++) {
-                *ptr = *(ptr+1) = *(ptr+2) = *bptr;
-                bptr++;
-                ptr += 3;
+                *ptr++ = *bptr;
+                *ptr++ = *bptr;
+                *ptr++ = *bptr++;
 	    }
 	}
     }