Fix FFT read range (now inclusive)

analyze_fft1024.h

@@ -74,7 +74,7 @@ public:
 		uint32_t sum = 0;
 		do {
 			sum += output[binFirst++];
-		} while (binFirst < binLast);
+		} while (binFirst <= binLast);
 		return (float)sum * (1.0 / 16384.0);
 	}
 	void averageTogether(uint8_t n) {

analyze_fft256.h

@@ -82,7 +82,7 @@ public:
 		uint32_t sum = 0;
 		do {
 			sum += output[binFirst++];
-		} while (binFirst < binLast);
+		} while (binFirst <= binLast);
 		return (float)sum * (1.0 / 16384.0);
 	}
 	void averageTogether(uint8_t n) {