Merge pull request #582 from paulscottrobson/openbug

Fixed open.

basic/test.bsc

@@ -1,18 +1,9 @@
-sound 0,100,100,14
-end
+if exists("test.txt") then mos "del test.txt"
 
-call snd(0,660,50,0,0,100)
-call snd(0,440,50,0,0,30)
-end
-
-proc snd(ch,fq,ms,sl,ty,v)
-	while peek($FF00):wend
-	poke $FF04,ch
-	doke $FF05,fq
-	doke $FF07,ms
-	doke $FF09,sl
-	poke $FF0B,ty
-	poke $FF0C,v
-	poke $FF01,7
-	poke $FF00,8
-endproc
+open output 1,"test.txt"
+print #1,"Hello world"
+close 1
+cat
+open output 1,"test.txt"
+close 1
+cat

firmware/common/sources/interface/fileinterface.cpp

@@ -311,7 +311,8 @@ uint8_t FIOSetFileAttributes(const std::string& filename, uint8_t attribs) {
 uint8_t FIOOpenFileHandle(uint8_t fileno, const std::string& filename, uint8_t mode) {
 	if (mode == FIOMODE_RDWR_CREATE) {  											// If open truncate 
 		uint8_t exists;
-		if (FIOExistsFile(filename,&exists) == 0) {  								// If file exists
+		FIOExistsFile(filename,&exists);
+		if (exists) { 								 								// If file exists
 			uint8_t error = FIODeleteFile(filename);  								// try to delete it, as we truncate it anyway !
 			if (error) return error;
 		}