Fix path.getrelative() when trailing slashes are present

src/host/path_getrelative.c

@@ -38,6 +38,11 @@ static void normalize(char* buffer, const char* path)
 		++src;
 	}
 
+    /* remove any trailing slashes */
+    for (--src; src > buffer && *src == '/'; --src) {
+         *src = '\0';
+    }
+
 	*dst = '\0';
 }
 

tests/base/test_path.lua

@@ -209,6 +209,10 @@
 		test.isequal("..", path.getrelative("/a///b/c","/a/b"))
 	end
 
+    function suite.ignoresTrailingSlashes()
+         test.isequal("c", path.getrelative("/a/b/","/a/b/c"))
+    end
+
 
 --
 -- path.isabsolute() tests