Add return type and static keyword to common actor static funcs

src/d/actor/d_a_grid.cpp

@@ -32,7 +32,7 @@ void daHo_packet_c::draw() {
 }
 
 /* 800E9BE8-800E9C0C       .text daGrid_Draw__FP8daGrid_c */
-void daGrid_Draw(daGrid_c*) {
+static BOOL daGrid_Draw(daGrid_c*) {
     /* Nonmatching */
 }
 
@@ -42,22 +42,22 @@ void ho_move(daGrid_c*) {
 }
 
 /* 800EA928-800EA94C       .text daGrid_Execute__FP8daGrid_c */
-void daGrid_Execute(daGrid_c*) {
+static BOOL daGrid_Execute(daGrid_c*) {
     /* Nonmatching */
 }
 
 /* 800EA94C-800EA954       .text daGrid_IsDelete__FP8daGrid_c */
-void daGrid_IsDelete(daGrid_c*) {
+static BOOL daGrid_IsDelete(daGrid_c*) {
     /* Nonmatching */
 }
 
 /* 800EA954-800EA978       .text daGrid_Delete__FP8daGrid_c */
-void daGrid_Delete(daGrid_c*) {
+static BOOL daGrid_Delete(daGrid_c*) {
     /* Nonmatching */
 }
 
 /* 800EA978-800EA998       .text daGrid_Create__FP10fopAc_ac_c */
-void daGrid_Create(fopAc_ac_c*) {
+static s32 daGrid_Create(fopAc_ac_c*) {
     /* Nonmatching */
 }