[stage2] Invert a few checks

fusee/fusee-secondary/src/loader.c

@@ -220,7 +220,7 @@ void load_payload(const char *bct0) {
         generic_panic();
     }
 
-    if (ctx->chainload_entrypoint == 0 || ctx->nb_files_to_load > 0) {
+    if (ctx->chainload_entrypoint != 0 || ctx->nb_files_to_load > 0) {
         printf("Error: loadlist must be empty when booting Horizon!\n");
         generic_panic();
     }

fusee/fusee-secondary/src/package1.c

@@ -12,7 +12,7 @@ int package1_read_and_parse_boot0(void **package1loader, size_t *package1loader_
 
     size_t fpos, pk1_offset;
 
-    if (package1loader == NULL || package1loader_size != NULL || keyblobs == NULL || revision == NULL || boot0 == NULL) {
+    if (package1loader == NULL || package1loader_size == NULL || keyblobs == NULL || revision == NULL || boot0 == NULL) {
         errno = EINVAL;
         return -1;
     }