[sys] Fix bogus fclose() on failure.

ddunbar · ddunbar · commit 3b83850b03ef · 2015-12-11T13:25:06.000-08:00
diff --git a/Sources/sys/File.swift b/Sources/sys/File.swift
@@ -60,7 +60,9 @@ public class FileLineGenerator: GeneratorType, SequenceType {
     }
 
     deinit {
-        fclose(fp)
+        if fp != nil {
+            fclose(fp)
+        }
     }
 
     public func next() -> String? {

Original file line number	Diff line number	Diff line change
`@@ -60,7 +60,9 @@ public class FileLineGenerator: GeneratorType, SequenceType {`
`60`	`60`	`}`
`61`	`61`
`62`	`62`	`deinit {`
`63`		`- fclose(fp)`
	`63`	`+ if fp != nil {`
	`64`	`+ fclose(fp)`
	`65`	`+ }`
`64`	`66`	`}`
`65`	`67`
`66`	`68`	`public func next() -> String? {`