eina: do no use umask on Windows in eina_file_mkstemp()

umask() sets the permissions of the file to read-only on Windows
(see umask documentation on MSDN).
This breaks the creation of .edj file (epp needs to modify the
created file).
Anyway, on Windows, permissions should be given to anybody.

@fix

Signed-off-by: Cedric BAIL <cedric@osg.samsung.com>

src/lib/eina/eina_file_common.c

@@ -900,7 +900,9 @@ eina_file_mkstemp(const char *templatename, Eina_Tmpstr **path)
    const char *tmpdir = NULL;
    const char *XXXXXX = NULL;
    int fd, len;
+#ifndef _WIN32
    mode_t old_umask;
+#endif
 
 #ifndef HAVE_EVIL
 #if defined(HAVE_GETUID) && defined(HAVE_GETEUID)
@@ -915,11 +917,18 @@ eina_file_mkstemp(const char *templatename, Eina_Tmpstr **path)
 
    len = snprintf(buffer, PATH_MAX, "%s/%s", tmpdir, templatename);
 
-   /* 
+   /*
+    * Unix:
     * Make sure temp file is created with secure permissions,
     * http://man7.org/linux/man-pages/man3/mkstemp.3.html#NOTES
+    *
+    * Windows:
+    * no secure permissions anyway and the umask use below makes
+    * the file read-only.
     */
+#ifndef _WIN32
    old_umask = umask(S_IRWXG|S_IRWXO);
+#endif
    if ((XXXXXX = strstr(buffer, "XXXXXX.")) != NULL)
      {
         int suffixlen = buffer + len - XXXXXX - 6;
@@ -927,7 +936,9 @@ eina_file_mkstemp(const char *templatename, Eina_Tmpstr **path)
      }
    else
      fd = mkstemp(buffer);
+#ifndef _WIN32
    umask(old_umask);
+#endif
 
    if (path) *path = eina_tmpstr_add(buffer);
    if (fd < 0)