avutil/softfloat: Include negative numbers in cmp/gt tests

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 955cdc43)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>

libavutil/softfloat.c

@@ -109,9 +109,9 @@ int main(void){
     sf1 = av_div_sf(sf1, sf2);
     printf("test6 softfloat: %.10lf (0x%08x %d) %d %d\n", (double)av_sf2double(sf1), sf1.mant, sf1.exp, i, j);
 
-    for(i= 0; i<100; i++) {
+    for(i= -50; i<50; i++) {
         sf1= av_int2sf(i, 0);
-        for(j= 0; j<100; j++) {
+        for(j= -50; j<50; j++) {
             int c;
             sf2= av_int2sf(j, 0);
             c = av_cmp_sf(sf1, sf2);
@@ -124,7 +124,7 @@ int main(void){
             }
         }
         sf1 = av_int2sf(1, i);
-        for(j = 0; j < 100; j++) {
+        for(j = -50; j < 50; j++) {
             int c;
             sf2 = av_int2sf(1, j);
             c = av_cmp_sf(sf2, sf1);