Fix command argument parser

Fixes segmentation fault on unknown arguments;

Signed-off-by: Artem Senichev <[email protected]>

src/info.c

@@ -312,8 +312,14 @@ static enum config_status load_config(const char* key, const char* value)
     }
 
     // set new scheme
-    block->scheme = realloc(block->scheme, scheme_sz * sizeof(enum info_field));
-    memcpy(block->scheme, scheme, scheme_sz * sizeof(enum info_field));
+    if (scheme_sz) {
+        block->scheme =
+            realloc(block->scheme, scheme_sz * sizeof(enum info_field));
+        memcpy(block->scheme, scheme, scheme_sz * sizeof(enum info_field));
+    } else {
+        free(block->scheme);
+        block->scheme = NULL;
+    }
     block->scheme_sz = scheme_sz;
 
     return cfgst_ok;

src/main.c

@@ -107,7 +107,12 @@ static int parse_cmdargs(int argc, char* argv[])
 
     // parse arguments
     while ((opt = getopt_long(argc, argv, short_opts, options, NULL)) != -1) {
-        const struct cmdarg* arg = arguments;
+        const struct cmdarg* arg;
+        if (opt == '?') {
+            return -1;
+        }
+        // get argument description
+        arg = arguments;
         while (arg->short_opt != opt) {
             ++arg;
         }