softfloat-native: fix type of float_rounding_mode

fegetround() and fesetround() are using an int type. Change the type of
float_rounding_mode and floatx80_rounding_precision in the float_status
structure for consistency.
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6115 c046a42c-6fe2-441c-8c8c-71466251a162

fpu/softfloat-native.h

@@ -140,9 +140,9 @@ enum {
 #endif
 
 typedef struct float_status {
-    signed char float_rounding_mode;
+    int float_rounding_mode;
 #ifdef FLOATX80
-    signed char floatx80_rounding_precision;
+    int floatx80_rounding_precision;
 #endif
 } float_status;