Check getcwd return value, abort if rpm cannot determine current
directory.

--- ./build.c.orig	2004-10-17 19:00:10.000000000 +0000
+++ ./build.c	2005-12-19 17:52:25.000000000 +0000
@@ -206,7 +211,10 @@ static int buildForTarget(rpmts ts, cons
 	   directory for this run */
 
 	if (*arg != '/') {
-	    (void)getcwd(buf, BUFSIZ);
+	    if (!getcwd(buf, BUFSIZ)) {
+		rpmError(RPMERR_STAT, "getcwd failed: %m\n");
+		return 1;
+	    }
 	    strcat(buf, "/");
 	    strcat(buf, arg);
 	} else 
@@ -225,7 +233,11 @@ static int buildForTarget(rpmts ts, cons
     specut = urlPath(specURL, &specFile);
     if (*specFile != '/') {
 	char *s = alloca(BUFSIZ);
-	(void)getcwd(s, BUFSIZ);
+	if (!getcwd(s, BUFSIZ)) {
+	    rpmError(RPMERR_STAT, "getcwd failed: %m\n");
+	    rc = 1;
+	    goto exit;
+	}
 	strcat(s, "/");
 	strcat(s, arg);
 	specURL = s;