Fix double frees in ecpg.

Patch by Patrick Krecker <patrick@judicata.com>

diff --git a/src/interfaces/ecpg/preproc/ecpg.c b/src/interfaces/ecpg/preproc/ecpg.c
index cd770c8b1569531fcceddd204484632f8d57e780..0704837396f7678bb8248d2023e88c4754e379de 100644 (file)
--- a/src/interfaces/ecpg/preproc/ecpg.c
+++ b/src/interfaces/ecpg/preproc/ecpg.c
@@ -327,6 +327,7 @@ main(int argc, char *const argv[])
                                                fprintf(stderr, _("%s: could not open file \"%s\": %s\n"),
                                                                progname, output_filename, strerror(errno));
                                                free(output_filename);
+                                               output_filename = NULL;
                                                free(input_filename);
                                                continue;
                                        }
@@ -474,8 +475,10 @@ main(int argc, char *const argv[])
                                }
                        }
 
-                       if (output_filename && out_option == 0)
+                       if (output_filename && out_option == 0) {
                                free(output_filename);
+                               output_filename = NULL;
+                       }
 
                        free(input_filename);
                }