print Via warning only in verbose mode - thanks to Juha Heinanen

git-svn-id: http://svn.berlios.de/svnroot/repos/sipsak/trunk@441 75b5f7c7-cfd4-0310-b54c-e118b2c5249a
(cherry picked from commit 80b5cf6be9dff6a6a38cce6d59da503a6871e739)
(cherry picked from commit d86bffb4c5)

sipsak.c

@@ -915,7 +915,9 @@ int main(int argc, char *argv[])
 			}
 		}
 		if (via_ins) {
-			fprintf(stderr, "warning: ignoring -i option when in usrloc mode\n");
+			if (verbose > 1) {
+				fprintf(stderr, "warning: Deactivated Via insertion in usrloc mode.\n         Please use option -i to surpress this warning.\n");
+			}
 			via_ins=0;
 		}
 		if (nameend==-1)