Use love.run's return value as return value (if valid), default to 0

src/scripts/boot.lua

@@ -805,7 +805,7 @@ local result = xpcall(love.boot, error_printer)
 if not result then return 1 end
 local result = xpcall(love.init, love._release and love.releaseerrhand or love.errhand)
 if not result then return 1 end
-local result = xpcall(love.run, love._release and love.releaseerrhand or love.errhand)
+local result, retval = xpcall(love.run, love._release and love.releaseerrhand or love.errhand)
 if not result then return 1 end
 
-return 0
+return tonumber(retval) or 0

src/scripts/boot.lua.h

@@ -1858,13 +1858,15 @@ const unsigned char boot_lua[] =
 	0x72, 0x20, 0x6c, 0x6f, 0x76, 0x65, 0x2e, 0x65, 0x72, 0x72, 0x68, 0x61, 0x6e, 0x64, 0x29, 0x0a,
 	0x69, 0x66, 0x20, 0x6e, 0x6f, 0x74, 0x20, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x20, 0x74, 0x68, 0x65, 0x6e, 
 	0x20, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x20, 0x31, 0x20, 0x65, 0x6e, 0x64, 0x0a,
-	0x6c, 0x6f, 0x63, 0x61, 0x6c, 0x20, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x20, 0x3d, 0x20, 0x78, 0x70, 0x63, 
-	0x61, 0x6c, 0x6c, 0x28, 0x6c, 0x6f, 0x76, 0x65, 0x2e, 0x72, 0x75, 0x6e, 0x2c, 0x20, 0x6c, 0x6f, 0x76, 0x65, 
-	0x2e, 0x5f, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x20, 0x61, 0x6e, 0x64, 0x20, 0x6c, 0x6f, 0x76, 0x65, 
-	0x2e, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x65, 0x72, 0x72, 0x68, 0x61, 0x6e, 0x64, 0x20, 0x6f, 0x72, 
-	0x20, 0x6c, 0x6f, 0x76, 0x65, 0x2e, 0x65, 0x72, 0x72, 0x68, 0x61, 0x6e, 0x64, 0x29, 0x0a,
+	0x6c, 0x6f, 0x63, 0x61, 0x6c, 0x20, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x2c, 0x20, 0x72, 0x65, 0x74, 0x76, 
+	0x61, 0x6c, 0x20, 0x3d, 0x20, 0x78, 0x70, 0x63, 0x61, 0x6c, 0x6c, 0x28, 0x6c, 0x6f, 0x76, 0x65, 0x2e, 0x72, 
+	0x75, 0x6e, 0x2c, 0x20, 0x6c, 0x6f, 0x76, 0x65, 0x2e, 0x5f, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x20, 
+	0x61, 0x6e, 0x64, 0x20, 0x6c, 0x6f, 0x76, 0x65, 0x2e, 0x72, 0x65, 0x6c, 0x65, 0x61, 0x73, 0x65, 0x65, 0x72, 
+	0x72, 0x68, 0x61, 0x6e, 0x64, 0x20, 0x6f, 0x72, 0x20, 0x6c, 0x6f, 0x76, 0x65, 0x2e, 0x65, 0x72, 0x72, 0x68, 
+	0x61, 0x6e, 0x64, 0x29, 0x0a,
 	0x69, 0x66, 0x20, 0x6e, 0x6f, 0x74, 0x20, 0x72, 0x65, 0x73, 0x75, 0x6c, 0x74, 0x20, 0x74, 0x68, 0x65, 0x6e, 
 	0x20, 0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x20, 0x31, 0x20, 0x65, 0x6e, 0x64, 0x0a,0x0a,
-	0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x20, 0x30, 0x0a,
+	0x72, 0x65, 0x74, 0x75, 0x72, 0x6e, 0x20, 0x74, 0x6f, 0x6e, 0x75, 0x6d, 0x62, 0x65, 0x72, 0x28, 0x72, 0x65, 
+	0x74, 0x76, 0x61, 0x6c, 0x29, 0x20, 0x6f, 0x72, 0x20, 0x30, 0x0a,
 }; // [boot.lua]
 } // love