lib,wcc,w6a,w6l: char-literals for remaining source magic decimals (Wave-1)

selfhost/cmd/wcc/cgenutil.ww

@@ -1495,7 +1495,7 @@ fn structlookup(c: *cgen, name: str) *structinfo = {
 	// prevents same-leaf structs in two modules from collapsing.
 	let i: i32 = name.len - 1;
 	for (i >= 0) {
-		if (name[i] == 46u8) {	// '.'
+		if (name[i] == '.') {
 			let pkg: str;
 			pkg.ptr = name.ptr;
 			pkg.len = i;