Keep errno over uio_free().

git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@3060 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/src/sc2code/libs/uio/stdio/stdio.c

@@ -407,7 +407,10 @@ stdio_getPDirEntryHandle(const uio_PDirHandle *pDirHandle, const char *name) {
 	}
 
 	if (stat(path, &statBuf) == -1) {
+		// errno is set.
+		int savedErrno = errno;
 		uio_free(path);
+		errno = savedErrno;
 		return NULL;
 	}
 	uio_free(path);