Fixed fresh IIgs installer bug.

scripts/installer.sh

@@ -201,7 +201,9 @@ function configWrite() {
 		# IIgs Runtime & ORCA Compilers
 		P=\${JOEY}/sdks/IIgs:${P}
 		echo "export GOLDEN_GATE=\"\${JOEY}/sdks/IIgs/ORCA\"" >> "${O}"
-		echo "mountORCA.sh" >> "${O}"
+		echo "if [[ -e \"\${JOEY}/sdks/IIgs/mountORCA.sh\" ]]; then" >> "${O}"
+		echo -e "\t\"\${JOEY}/sdks/IIgs/mountORCA.sh\"" >> "${O}"
+		echo "fi" >> "${O}"
 	fi
 	if [[ ${G_IS_INSTALLED[$G_ATARIST]} == 1 ]]; then
 		# All VBCC targets get these