[core,libyuv,modules] Fix function declarations without a prototype

src/mod/applications/mod_av/avcodec.c

@@ -2208,7 +2208,7 @@ static void parse_codecs(avcodec_profile_t *aprofile, switch_xml_t codecs)
 }
 
 
-static void load_config()
+static void load_config(void)
 {
 	switch_xml_t cfg = NULL, xml = NULL;
 

src/mod/applications/mod_av/avformat.c

@@ -2861,7 +2861,7 @@ static char *supported_formats[SWITCH_MAX_CODECS] = { 0 };
 
 static const char modname[] = "mod_av";
 
-static switch_status_t load_config()
+static switch_status_t load_config(void)
 {
 	char *cf = "avformat.conf";
 	switch_xml_t cfg, xml, param, settings;