coverity#1438194 silence Resource leak

Change-Id: I54cf8e4fc430feb2e34d3f6f0f2abce81973b09a
Reviewed-on: https://gerrit.libreoffice.org/58481
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sal/osl/unx/tempfile.cxx

@@ -305,16 +305,18 @@ oslFileError SAL_CALL osl_createTempFile(
             osl_error = osl_removeFile(temp_file_url);
 
             if (osl_error == osl_File_E_None)
+            {
                 *pHandle = temp_file_handle;
-            else
-                osl_closeFile(temp_file_handle);
+                temp_file_handle = nullptr;
+            }
         }
         else
         {
             if (pHandle)
+            {
                 *pHandle = temp_file_handle;
-            else
-                osl_closeFile(temp_file_handle);
+                temp_file_handle = nullptr;
+            }
 
             rtl_uString_assign(ppustrTempFileURL, temp_file_url);
         }
@@ -322,6 +324,9 @@ oslFileError SAL_CALL osl_createTempFile(
         rtl_uString_release(temp_file_url);
     }
 
+    if (temp_file_handle)
+        osl_closeFile(temp_file_handle);
+
     rtl_uString_release(base_directory);
 
     return osl_error;