[gegl] tests: obey some clang code clarity suggestions

[Øyvind Kolås <ok src gnome org>]

commit df06899e211a2873f58c4bdaf4bb638fae7f9b7b
Author: Øyvind Kolås <pippin gimp org>
Date:   Sat Sep 30 02:01:55 2017 +0200

    tests: obey some clang code clarity suggestions

 tests/simple/test-misc.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/tests/simple/test-misc.c b/tests/simple/test-misc.c
index 8ab0ecf..78a59bd 100644
--- a/tests/simple/test-misc.c
+++ b/tests/simple/test-misc.c
@@ -34,7 +34,7 @@ test_misc_case_sensitive_mime_handler (void)
   gegl_operation_handlers_register_loader (mime, handler);
 
   received_handler = gegl_operation_handlers_get_loader (mime);
-  if (! strcmp (received_handler, handler) == 0)
+  if ( strcmp (received_handler, handler) != 0)
     result = FAILURE;
 
   return result;
@@ -53,7 +53,7 @@ test_misc_case_insensitive_extension_handler (void)
 
   /* Make sure comparisions are case insensitive */
   received_handler = gegl_operation_handlers_get_loader (uppercase);
-  if (! strcmp (received_handler, handler) == 0)
+  if (strcmp (received_handler, handler) != 0)
     result = FAILURE;
 
   return result;
@@ -70,7 +70,7 @@ test_misc_save_handler (void)
   gegl_operation_handlers_register_saver (ext, handler);
 
   received_handler = gegl_operation_handlers_get_saver (ext);
-  if (! strcmp (received_handler, handler) == 0)
+  if (strcmp (received_handler, handler) != 0)
     result = FAILURE;
 
   return result;