Compatibility fix for Mac OS X 10.4 targets.

git-svn-id: http://svn.berlios.de/svnroot/repos/oolite-linux/trunk@4615 127b21dd-08f5-0310-b4b7-95ae10353056

src/Core/OOStringParsing.m

@@ -285,7 +285,11 @@ NSString *ExpandDescriptionForSeed(NSString *text, Random_Seed seed, NSString *n
 	// Stop randomly generated system description strings from containing double spaces!
 	if (EXPECT_NOT([text isEqualToString:@"[system-description-string]"]))
 	{
+#if OOLITE_HAVE_STRING_BY_REPLACING
 		result = [result stringByReplacingOccurrencesOfString:@"  " withString:@" "];
+#else
+		result = [[result componentsSeparatedByString:@"  "] componentsJoinedByString:@" "];
+#endif
 	}
 	
 	return result;