fix exit codes

Author: adomurad

host/roc/app.go

@@ -65,7 +65,7 @@ func Main(options Options) int {
 
 	C.roc__mainForHost_1_exposed_generic(capturePtr)
 
-	var result C.struct_ResultVoidI32
+	var result C.struct_ResultVoidI64
 	C.roc__mainForHost_0_caller(nil, capturePtr, &result)
 
 	// TODO - error handling

host/roc/app.h

@@ -1,7 +1,7 @@
 #include "roc_std.h"
 
-struct ResultVoidI32 {
-    union {long int exit_code;} payload;
+struct ResultVoidI64 {
+    union {int64_t exit_code;} payload;
     unsigned char disciminant;
 };
 
@@ -20,4 +20,4 @@ struct ResultVoidStr {
 
 void roc__mainForHost_1_exposed_generic(void* captures);
 size_t roc__mainForHost_1_exposed_size();
-void roc__mainForHost_0_caller(char* flags, void* closure_data, struct ResultVoidI32 *result);
+void roc__mainForHost_0_caller(char* flags, void* closure_data, struct ResultVoidI64 *result);