Fix constness in StripPath
diff --git a/rmi4update/updateutil.cpp b/rmi4update/updateutil.cpp
index 5b27e71..df070a6 100644
--- a/rmi4update/updateutil.cpp
+++ b/rmi4update/updateutil.cpp
@@ -72,10 +72,10 @@
 		+ (unsigned long)data [1] * 0x100;
 }
 
-const char * StripPath(char * path, ssize_t size)
+const char * StripPath(const char * path, ssize_t size)
 {
 	int i;
-	char * str;
+	const char * str;
 
 	for (i = size - 1, str = &path[size - 1]; i > 0; --i, --str)
 		if (path[i - 1] == '/')