Update esp32-cam.ino

cubesatsim/esp32-cam/esp32-cam.ino

@@ -306,6 +306,7 @@ void load_files() {
   } else {
     Serial.println("Loading image sstv_image_1_320_x_240.jpg into FS");
     f = SPIFFS.open("/sstv_image_1_320_x_240.jpg", FILE_WRITE);
+    if (!f) Serial.println("Error opening");	  	  
     if (f.write(sstv_image_1_320_x_240, sizeof(sstv_image_1_320_x_240)) < sizeof(sstv_image_1_320_x_240)) {
        Serial.println("Loading image failed.");	     
        delay(2000);
@@ -320,6 +321,7 @@ void load_files() {
   } else {
     Serial.println("Loading image sstv_image_2_320_x_240.jpg into FS");
     f = SPIFFS.open("/sstv_image_2_320_x_240.jpg", FILE_WRITE);
+    if (!f) Serial.println("Error opening");		  
     if (f.write(sstv_image_2_320_x_240, sizeof(sstv_image_2_320_x_240)) < sizeof(sstv_image_2_320_x_240)) {
        Serial.println("Loading image failed");
        delay(2000);