Fix for check_load plugin

[Laurence P Dawson]

There is a minor problem in the check_load.c plugin. It checks for
is_intnonneg for the values of parameters that are supplsed to be
floats. 
There is a definite advantage for us in allowing float values, as using
a value like 1.9 instead of 2 reduces notifications due to 'flapping'.


/************************************************/

189c189
< 			if (is_intnonneg (optarg)) {
---
> 			if (is_numeric (optarg)) {
205c205
< 			if (is_intnonneg (optarg)) {
---
> 			if (is_numeric (optarg)) {

/************************************************/




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