Floating point value with trailing dot removes newline, causing syntax error

The following is correct:
```
>>> jsmin("""
x = 1.0
y = 2
""")
'x=1.0\ny=2'
```

But the following removes the newline, causing a syntax error:
```
>>> jsmin("""
x = 1.
y = 2
""")
'x=1.y=2'
```
