Allow for non-integer quality values in img2twit.

git-svn-id: file:///srv/caca.zoy.org/var/lib/svn/libpipi/trunk@3525 92316355-f0b4-4df1-b90c-862c8a59935f

examples/img2twit.cpp

@@ -832,7 +832,7 @@ int main(int argc, char *argv[])
             }
             break;
         case 'q':
-            ITERATIONS_PER_POINT = 10 * atoi(myoptarg);
+            ITERATIONS_PER_POINT = 10 * atof(myoptarg);
             if(ITERATIONS_PER_POINT < 0)
                 ITERATIONS_PER_POINT = 0;
             else if(ITERATIONS_PER_POINT > 100)