Resolved sign comparison warning

Author: gaborszanto

Superpowered/OpenSource/SuperpoweredIOSAudioIO.mm

@@ -412,26 +412,21 @@ static OSStatus coreAudioProcessingCallback(void *inRefCon, AudioUnitRenderActio
         }
     }
 
-#if !TARGET_OS_MACCATALYST // iOS or Mac (Designed for iPad)
     BOOL isiOSAppOnMac = false;
+#if !TARGET_OS_MACCATALYST // iOS or Mac (Designed for iPad)
     if (@available(iOS 14.0, *)) {
         isiOSAppOnMac = NSProcessInfo.processInfo.isiOSAppOnMac;
     }
-#else // Mac Catalyst
-    BOOL isiOSAppOnMac = false;
 #endif
-    
-    if(isiOSAppOnMac) { // iOS: original code
+    if (isiOSAppOnMac) {
         if (((int)inNumberFrames < self->minimumNumberOfFrames) || ((int)inNumberFrames > self->maximumNumberOfFrames) || ((int)ioData->mBuffers[0].mNumberChannels != self->numberOfChannels)) {
             return kAudioUnitErr_InvalidParameter;
         };
-    }
-    else { // macOS: ported from SuperpoweredOSXAudioIO.mm
-        if ((d.rem != 0) || (inNumberFrames < 32) || (inNumberFrames > MAXFRAMES) || (ioData->mBuffers[0].mNumberChannels != self->numberOfChannels)) {
+    } else {
+        if ((d.rem != 0) || (inNumberFrames < 32) || (inNumberFrames > MAXFRAMES) || ((int)ioData->mBuffers[0].mNumberChannels != self->numberOfChannels)) {
             return kAudioUnitErr_InvalidParameter;
         };
     }
-    
 
     // Get audio input.
     float *inputBuf = NULL;