protoc: simplify configure check

diff --git a/configure.ac b/configure.ac
index d5b8c79..f9802ce 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -60,14 +60,13 @@ AC_CHECK_PROG([have_protoc_c], [protoc-c], [yes], [no])
 if test "x$have_protoc_c" = "xno"
 then
        have_protoc_c="no (protoc-c compiler not found)"
-else
+fi
+
+if test "X$have_protoc_c" = "xyes"
+then
        AC_CHECK_HEADERS([google/protobuf-c/protobuf-c.h],
-                        [have_protobuf_c_h="yes"],
-                        [have_protobuf_c_h="no"])
-       if test "x$have_protobuf_c_h" = "xno"
-       then
-               have_protoc_c="no (<google/protobuf-c/protobuf-c.h> not found)"
-       fi
+                        []
+                        [have_protoc_c="no (<google/protobuf-c/protobuf-c.h> not found)"])
 fi
 AM_CONDITIONAL(HAVE_PROTOC_C, test "x$have_protoc_c" = "xyes")