build: Fix protocol-structs check in VPATH build

$@ already included $(srcdir)

diff --git a/src/Makefile.am b/src/Makefile.am
index 54b1ca0d2c95450eaf8ed4e8415626eb2fa12cc6..94a9a430cb1fe208dcc57ea7a34a004a22d07f0e 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -241,7 +241,7 @@ PDWTAGS = \
                -e '}'                                                  \
                > $@-t;                                                 \
          case $$? in 8) exit 0;; 0) ;; *) exit 1;; esac;               \
-         diff -u $@-t $(srcdir)/$@; st=$$?; rm -f $@-t; exit $$st;     \
+         diff -u $@-t $@; st=$$?; rm -f $@-t; exit $$st;       \
        else                                                            \
          echo 'WARNING: you lack pdwtags; skipping the $@ test' >&2;   \
          echo 'WARNING: install the dwarves package to get pdwtags' >&2; \