address variaty of compiler warnings and code documentation

src/core2/gc/section.c

@@ -182,7 +182,7 @@ MapInfo * func_8030AD00(enum map_e map_id){
 
 enum level_e map_getLevel(enum map_e map){
     return func_8030AD00(map)->level_id;
-};
+}
 
 /* returns string containing the map name and index */
 char *gcsection_getName(enum map_e map){
@@ -280,4 +280,4 @@ void func_8030AFD8(s32 arg0){
     func_80250FC0(); //stop controller motor
     gcpausemenu_80314B24();
     func_80347A70();
-}
+}