[gimp] libgimpwidgets: free leaked GError.

[Jehan <jehanp src gnome org>]

commit dd38b88cc2c182a612d1e10d9433b965d6d6357d
Author: Jehan <jehan girinstud io>
Date:   Sun Aug 22 12:22:50 2021 +0200

    libgimpwidgets: free leaked GError.
    
    Thanks to Massimo for reporting.

 libgimpwidgets/gimpeevl.c      | 2 +-
 libgimpwidgets/gimpsizeentry.c | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/libgimpwidgets/gimpeevl.c b/libgimpwidgets/gimpeevl.c
index 55bf3232bb..a643bc097e 100644
--- a/libgimpwidgets/gimpeevl.c
+++ b/libgimpwidgets/gimpeevl.c
@@ -162,7 +162,7 @@ static void             gimp_eevl_error                    (GimpEevl
  * @result:        Result of evaluation.
  * @error_pos:     Will point to the position within the string,
  *                 before which the parse / evaluation error
- *                 occurred. Will be set to null of no error occurred.
+ *                 occurred. Will be set to null if no error occurred.
  * @error_message: Will point to a static string with a semi-descriptive
  *                 error message if parsing / evaluation failed.
  *
diff --git a/libgimpwidgets/gimpsizeentry.c b/libgimpwidgets/gimpsizeentry.c
index 4f10cb6bf8..28333dea59 100644
--- a/libgimpwidgets/gimpsizeentry.c
+++ b/libgimpwidgets/gimpsizeentry.c
@@ -1366,7 +1366,7 @@ gimp_size_entry_eevl_input_callback (GtkSpinButton *spinner,
   GimpSizeEntryPrivate *priv      = GET_PRIVATE (gsef->gse);
   GimpEevlOptions       options   = GIMP_EEVL_OPTIONS_INIT;
   gboolean              success   = FALSE;
-  const gchar          *error_pos = 0;
+  const gchar          *error_pos = NULL;
   GError               *error     = NULL;
   GimpEevlQuantity      result;
 
@@ -1424,6 +1424,7 @@ gimp_size_entry_eevl_input_callback (GtkSpinButton *spinner,
         {
           g_printerr ("ERROR: Expression evaluation failed without error.\n");
         }
+      g_clear_error (&error);
 
       gtk_widget_error_bell (GTK_WIDGET (spinner));
       return GTK_INPUT_ERROR;