aaudio: Fix formatting.

src/cubeb_aaudio.cpp

@@ -62,7 +62,7 @@
   X(AAudioStreamBuilder_setUsage)
 
 // not needed or added later on
-  // X(AAudioStreamBuilder_setFramesPerDataCallback) \
+// X(AAudioStreamBuilder_setFramesPerDataCallback) \
   // X(AAudioStreamBuilder_setDeviceId)              \
   // X(AAudioStreamBuilder_setSamplesPerFrame)       \
   // X(AAudioStream_getSamplesPerFrame)              \