StringForRate(): adjustments

* Make 1000.0f the default base
* Also use sizeof() in MediaPlayer to get the string size rather than hardcode.

Thanks Marcus

headers/private/shared/StringForRate.h

@@ -12,7 +12,7 @@ namespace BPrivate {
 
 
 const char* string_for_rate(double rate, char* string, size_t stringSize,
-	double base = 1024.0f);
+	double base = 1000.0f);
 
 
 }	// namespace BPrivate

src/apps/mediaplayer/InfoWin.cpp

@@ -410,7 +410,7 @@ printf("InfoWin::Update(0x%08lx)\n", which);
 			float br = format.u.encoded_audio.bit_rate;
 			char string[20] = "";
 			if (br > 0.0)
-				s << ", " << string_for_rate(br, string, 20, 1000.0);
+				s << ", " << string_for_rate(br, string, sizeof(string));
 		}
 		s << "\n\n";
 		fContentsView->Insert(s.String());