shithub: rgbds

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Reinstate "empty filename" assertion in `__FILE__` callback

This assertion was mentioned by a comment, but deleted for some reason.

--- a/src/asm/symbol.c

+++ b/src/asm/symbol.c

@@ -96,6 +96,7 @@

 	char const *fileName = fstk_GetFileName();

 	size_t j = 1;

+	assert(fileName[0]);

 	/* The assertion above ensures the loop runs at least once */

 	for (size_t i = 0; fileName[i]; i++, j++) {

 		/* Account for the extra backslash inserted below */