In sc_set_text_mode(), reset fontwidth if it is <= 0. Eliminates division by zero errors in syscons driver.
In sc_set_text_mode(), reset fontwidth if it is <= 0.
Eliminates division by zero errors in syscons driver.

Reported by:	keramida, Slawa Olhovchenkov <slw at zxy dot spb dot ru>,
		Kyryll Mirnenko <mirya at matrix dot kiev dot ua>
Tested by:	keramida, rodrigc

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase