[PATCH] Fix strtod for small DBL_DIG

[Christian Bruel]

Hello,

This fixes a Plummhall ch7_1961B test failure discovered on SH4 GCC for 
-m4-single-only mode (doubles as 32 bit floats) on sscanf.

It is better illustrated with the attached reduced test case. The 
problem turned out to be the digit counts in _strtod_ that are 
incremented to much beyond DBL_DIG.

The attached patch fixes this problem by updating the counts after the 
DBL_DIG checks.

Best Regards.

Christian




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