properly free memory/close fd upon errors (Thanks xeen)

Found with the static analyzer cppcheck

src/cfgparse.y

@@ -188,6 +188,7 @@ static char *migrate_config(char *input, off_t size) {
         ret = read(readpipe[0], converted + read_bytes, conv_size - read_bytes);
         if (ret == -1) {
             warn("Cannot read from pipe");
+            FREE(converted);
             return NULL;
         }
         read_bytes += ret;

src/ipc.c

@@ -59,8 +59,10 @@ static bool mkdirp(const char *path) {
         copy[strlen(copy)-1] = '\0';
 
     char *sep = strrchr(copy, '/');
-    if (sep == NULL)
+    if (sep == NULL) {
+        FREE(copy);
         return false;
+    }
     *sep = '\0';
     bool result = false;
     if (mkdirp(copy))

src/util.c

@@ -374,11 +374,13 @@ char *store_restart_layout() {
         if (n == -1) {
             perror("write()");
             free(filename);
+            close(fd);
             return NULL;
         }
         if (n == 0) {
             printf("write == 0?\n");
             free(filename);
+            close(fd);
             return NULL;
         }
         written += n;