ClangFormat: format '#if 0' code in intern/

intern/utfconv/utfconv.c

@@ -265,7 +265,8 @@ int conv_utf_8_to_16(const char *in8, wchar_t *out16, size_t size16)
 static int is_ascii(const char *in8)
 {
   for (; *in8; in8++)
-    if (0x80 & *in8) return 0;
+    if (0x80 & *in8)
+      return 0;
 
   return 1;
 }
@@ -274,7 +275,8 @@ static void utf_8_cut_end(char *inout8, size_t maxcutpoint)
 {
   char *cur = inout8 + maxcutpoint;
   char cc;
-  if (!inout8) return;
+  if (!inout8)
+    return;
 
   cc = *cur;
 }