silence warnings from clang ccc-analyzer

src/buffer.c

@@ -929,7 +929,7 @@ void buffer_path_simplify(buffer *dest, buffer *src)
 		walk++;
 	}
 
-	pre2 = pre1 = 0;
+	pre1 = 0;
 	c = *(walk++);
 	/* prefix with '/' if not already present */
 	if (c != '/') {

src/configfile.c

@@ -166,6 +166,8 @@ static int config_insert(server *srv) {
 	srv->config_storage = calloc(1, srv->config_context->used * sizeof(specific_config *));
 
 	force_assert(srv->config_storage);
+	force_assert(srv->config_context->used); /* static analysis hint for ccc
+-analyzer */
 
 	for (i = 0; i < srv->config_context->used; i++) {
 		data_config const* config = (data_config const*)srv->config_context->data[i];

src/mod_fastcgi.c

@@ -2406,7 +2406,7 @@ static int fcgi_response_parse(server *srv, connection *con, plugin_data *p, buf
 					/* found the file */
 
 					/* parse range */
-					begin_range = 0; end_range = sce->st.st_size - 1;
+					end_range = sce->st.st_size - 1;
 					{
 						char *rpos = NULL;
 						errno = 0;

src/mod_webdav.c

@@ -590,7 +590,6 @@ static int webdav_delete_dir(server *srv, connection *con, plugin_data *p, physi
 
 		while(NULL != (de = readdir(dir))) {
 			struct stat st;
-			int status = 0;
 
 			if ((de->d_name[0] == '.' && de->d_name[1] == '\0')  ||
 			  (de->d_name[0] == '.' && de->d_name[1] == '.' && de->d_name[2] == '\0')) {
@@ -614,6 +613,7 @@ static int webdav_delete_dir(server *srv, connection *con, plugin_data *p, physi
 
 				/* try to unlink it */
 				if (-1 == rmdir(d.path->ptr)) {
+					int status;
 					switch(errno) {
 					case EACCES:
 					case EPERM:
@@ -631,8 +631,6 @@ static int webdav_delete_dir(server *srv, connection *con, plugin_data *p, physi
 #ifdef USE_PROPPATCH
 					sqlite3_stmt *stmt = p->conf.stmt_delete_uri;
 
-					status = 0;
-
 					if (stmt) {
 						sqlite3_reset(stmt);