Fix EOF checks in fmtscan

Previously the EOF checks were always false.

Change-Id: I2f5b1b56dcf88db70bf5839db8293789024a1b10

Author: lumynou5

tools/fmtscan.c

@@ -635,27 +635,27 @@ static get_char_t skip_inline_asm(parser_t *p, bool underscore)
     get_char_t ch;
 
     ch = get_char(p);
+    if (UNLIKELY(ch == PARSER_EOF))
+        return ch;
     if (ch != 's')
         goto check_s_failed;
+    ch = get_char(p);
     if (UNLIKELY(ch == PARSER_EOF))
         return ch;
-    ch = get_char(p);
     if (ch != 'm')
         goto check_m_failed;
-    if (UNLIKELY(ch == PARSER_EOF))
-        return ch;
 
     if (underscore) {
         ch = get_char(p);
+        if (UNLIKELY(ch == PARSER_EOF))
+            return ch;
         if (ch != '_')
             goto not_wrapped;
+        ch = get_char(p);
         if (UNLIKELY(ch == PARSER_EOF))
             return ch;
-        ch = get_char(p);
         if (ch != '_')
             goto check_underline_failed;
-        if (UNLIKELY(ch == PARSER_EOF))
-            return ch;
     }
 not_wrapped: