Ensure that we can seek in the file in js_loadfile.

jsload.c

@@ -25,10 +25,14 @@ int js_loadfile(js_State *J, const char *filename)
 	int n, t;
 
 	f = fopen(filename, "r");
-	if (!f)
+	if (!f) {
 		return js_error(J, "cannot open file: '%s'", filename);
+	}
 
-	fseek(f, 0, SEEK_END);
+	if (fseek(f, 0, SEEK_END) < 0) {
+		fclose(f);
+		return js_error(J, "cannot seek in file: '%s'", filename);
+	}
 	n = ftell(f);
 	fseek(f, 0, SEEK_SET);
 

jsparse.h

@@ -52,8 +52,8 @@ enum
 	EXP_NEG,
 	EXP_BITNOT,
 	EXP_LOGNOT,
-	EXP_LOGOR,
 
+	EXP_LOGOR,
 	EXP_LOGAND,
 	EXP_BITOR,
 	EXP_BITXOR,