fix some warnings about float precision

Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3508

src/hardware/cmos.cpp

@@ -68,7 +68,8 @@ static void cmos_checktimer(void) {
 	LOG(LOG_PIT,LOG_NORMAL)("RTC Timer at %.2f hz",1000.0/cmos.timer.delay);
 //	PIC_AddEvent(cmos_timerevent,cmos.timer.delay);
 	/* A rtc is always running */
-	PIC_AddEvent(cmos_timerevent,(double)cmos.timer.delay-fmod(PIC_FullIndex(),(double)cmos.timer.delay)); //Should be more like a real pc. Check
+	double remd=fmod(PIC_FullIndex(),(double)cmos.timer.delay);
+	PIC_AddEvent(cmos_timerevent,(float)((double)cmos.timer.delay-remd)); //Should be more like a real pc. Check
 //	status reg A reading with this (and with other delays actually)
 }
 

src/hardware/opl.cpp

@@ -62,7 +62,7 @@ static const fltype frqmul_tab[16] = {
 	0.5,1,2,3,4,5,6,7,8,9,10,10,12,12,15,15
 };
 // calculated frequency multiplication values (depend on sampling rate)
-static float frqmul[16];
+static fltype frqmul[16];
 
 // key scale levels
 static Bit8u kslev[8][16];