minerva: change some types and fix temp check

Temperature error check for over temp compensation was wrong.

It's still unused though, so it didn't matter.

modules/hekate_libsys_minerva/mtc.h

@@ -53,8 +53,8 @@
 
 typedef struct
 {
-	s32 rate_to;
-	s32 rate_from;
+	u32 rate_to;
+	u32 rate_from;
 	emc_table_t *mtc_table;
 	u32 table_entries;
 	emc_table_t *current_emc_table;