checker,cgen: move the `msvc compiler does not support inline assembl…

…y` to cgen (so it will only get triggered, when ASM blocks are still present, in what is passed to cgen)

vlib/v/checker/checker.v

@@ -2420,9 +2420,6 @@ fn (mut c Checker) asm_stmt(mut stmt ast.AsmStmt) {
 	if c.pref.backend.is_js() {
 		c.error('inline assembly is not supported in the js backend', stmt.pos)
 	}
-	if c.pref.backend == .c && c.pref.ccompiler_type == .msvc {
-		c.error('msvc compiler does not support inline assembly', stmt.pos)
-	}
 	mut aliases := c.asm_ios(mut stmt.output, mut stmt.scope, true)
 	aliases2 := c.asm_ios(mut stmt.input, mut stmt.scope, false)
 	aliases << aliases2

vlib/v/gen/c/cgen.v

@@ -2348,6 +2348,9 @@ fn (mut g Gen) stmt(node ast.Stmt) {
 			g.writeln('goto ${c_name(node.name)};')
 		}
 		ast.AsmStmt {
+			if g.is_cc_msvc {
+				g.error('msvc does not support inline assembly', node.pos)
+			}
 			g.write_v_source_line_info_stmt(node)
 			g.asm_stmt(node)
 		}