patch 9.0.1132: code is indented more than needed

Problem:    Code is indented more than needed.
Solution:   Use an early return to reduce indentation. (Yegappan Lakshmanan,
            closes #11769)
diff --git a/src/float.c b/src/float.c
index 04bb8a1..9e8074d 100644
--- a/src/float.c
+++ b/src/float.c
@@ -288,15 +288,15 @@
     if (in_vim9script() && check_for_float_or_nr_arg(argvars, 0) == FAIL)
 	return;
 
-    if (get_float_arg(argvars, &f) == OK)
-    {
-	if (f <= (float_T)-VARNUM_MAX + DBL_EPSILON)
-	    rettv->vval.v_number = -VARNUM_MAX;
-	else if (f >= (float_T)VARNUM_MAX - DBL_EPSILON)
-	    rettv->vval.v_number = VARNUM_MAX;
-	else
-	    rettv->vval.v_number = (varnumber_T)f;
-    }
+    if (get_float_arg(argvars, &f) != OK)
+	return;
+
+    if (f <= (float_T)-VARNUM_MAX + DBL_EPSILON)
+	rettv->vval.v_number = -VARNUM_MAX;
+    else if (f >= (float_T)VARNUM_MAX - DBL_EPSILON)
+	rettv->vval.v_number = VARNUM_MAX;
+    else
+	rettv->vval.v_number = (varnumber_T)f;
 }
 
 /*