Fixed the code style in *.c files to two spaces indentation and add a linter named funstx to Fun. (0.39.0)

src/external/curl.c

@@ -12,18 +12,23 @@
 /* Ensure libcurl headers and helpers are defined at file scope (not inside vm_run) */
 #ifdef FUN_WITH_CURL
 #include <curl/curl.h>
-typedef struct { char *d; size_t n; } FunCurlBuf;
+typedef struct {
+  char *d;
+  size_t n;
+} FunCurlBuf;
 static size_t fun_curl_write_cb(void *ptr, size_t sz, size_t nm, void *ud) {
   size_t add = sz * nm;
-  FunCurlBuf *b = (FunCurlBuf*)ud;
-  char *p = (char*)realloc(b->d, b->n + add + 1);
+  FunCurlBuf *b = (FunCurlBuf *)ud;
+  char *p = (char *)realloc(b->d, b->n + add + 1);
   if (!p) return 0;
   memcpy(p + b->n, ptr, add);
-  b->d = p; b->n += add; b->d[b->n] = '\0';
+  b->d = p;
+  b->n += add;
+  b->d[b->n] = '\0';
   return add;
 }
 static size_t fun_curl_file_write_cb(void *ptr, size_t sz, size_t nm, void *ud) {
-  FILE *f = (FILE*)ud;
+  FILE *f = (FILE *)ud;
   return fwrite(ptr, sz, nm, f);
 }
 #endif