MimeDetector: correct memcmp

Author: pschatzmann

src/AudioTools/CoreAudio/MimeDetector.h

@@ -64,12 +64,11 @@ class MimeDetector {
       const uint8_t* start = (const uint8_t*)data;
       if (start[0] == 0xFF && start[1] == 0xF1) {
         mime = "audio/aac";
-      } else if (memcmp(start, "ID3", 3) || start[0] == 0xFF ||
-                 start[0] == 0xFE) {
+      } else if (memcmp(start, "ID3", 3)==0 || start[0] == 0xFF || start[0] == 0xFE) {
         mime = "audio/mpeg";
-      } else if (memcmp(start, "RIFF", 4)) {
+      } else if (memcmp(start, "RIFF", 4)==0) {
         mime = "audio/vnd.wave";
-      } else if (memcmp(start, "OggS", 4)) {
+      } else if (memcmp(start, "OggS", 4)==0) {
         mime = "audio/ogg";
       }
     }