Improved error handling for struct types

lib/sys/net_linux.q

@@ -13,7 +13,7 @@ accept(fd Int, address Pointer, length Int) -> Int {
 	return syscall(43, fd, address, length)
 }
 
-bind(fd Int, address Pointer, length Int) -> Int {
+bind(fd Int, address *sockaddr_in, length Int) -> Int {
 	return syscall(49, fd, address, length)
 }
 

lib/sys/time_linux.q

@@ -1,3 +1,8 @@
-nanosleep(duration Pointer) -> Int {
+struct timespec {
+	seconds Int
+	nanoseconds Int
+}
+
+nanosleep(duration *timespec) -> Int {
 	return syscall(35, duration, 0)
 }

lib/time/time.q

@@ -7,7 +7,7 @@ sleep(nanoseconds Int) {
 		seconds, nanoseconds = nanoseconds / 1000000000
 	}
 
-	duration := new(timespec)
+	duration := new(sys.timespec)
 	duration.seconds = seconds
 	duration.nanoseconds = nanoseconds
 	sys.nanosleep(duration)

lib/time/timespec.q

@@ -1,4 +0,0 @@
-struct timespec {
-	seconds Int
-	nanoseconds Int
-}

src/types/ByName.go

@@ -8,7 +8,13 @@ import (
 func ByName(name string, pkg string, structs map[string]*Struct) Type {
 	if strings.HasPrefix(name, "*") {
 		to := strings.TrimPrefix(name, "*")
-		return &Pointer{To: ByName(to, pkg, structs)}
+		typ := ByName(to, pkg, structs)
+
+		if typ != nil {
+			return &Pointer{To: typ}
+		}
+
+		return nil
 	}
 
 	switch name {
@@ -32,5 +38,11 @@ func ByName(name string, pkg string, structs map[string]*Struct) Type {
 		return PointerAny
 	}
 
-	return structs[pkg+"."+name]
+	typ, exists := structs[pkg+"."+name]
+
+	if !exists {
+		return nil
+	}
+
+	return typ
 }