dl: always use dl.get_shared_library_extension() for dl.dl_ext

vlib/dl/dl.v

@@ -2,4 +2,16 @@ module dl
 
 pub const (
 	version = 1
+	dl_ext    = get_shared_library_extension()
 )
+
+pub fn get_shared_library_extension() string {
+	mut res := '.so'
+	$if macos {
+		res = '.dylib'
+	}
+	$if windows {
+		res = '.dll'
+	}
+	return res
+}

vlib/dl/dl_nix.c.v

@@ -4,7 +4,6 @@ module dl
 pub const (
 	rtld_now  = C.RTLD_NOW
 	rtld_lazy = C.RTLD_LAZY
-	dl_ext    = get_shared_library_extension()
 )
 
 fn C.dlopen(filename charptr, flags int) voidptr
@@ -27,14 +26,3 @@ pub fn close(handle voidptr) bool {
 pub fn sym(handle voidptr, symbol string) voidptr {
 	return C.dlsym(handle, symbol.str)
 }
-
-pub fn get_shared_library_extension() string {
-	mut res := '.so'
-	$if macos {
-		res = '.dylib'
-	}
-	$if windows {
-		res = '.dll'
-	}
-	return res
-}

vlib/dl/dl_windows.c.v

@@ -3,7 +3,6 @@ module dl
 pub const (
 	rtld_now = 0
 	rtld_lazy = 0
-	dl_ext   = '.dll'
 )
 
 fn C.LoadLibrary(libfilename C.LPCWSTR) voidptr