Laurentiu Cocanu - add error handling

src/target/arm11.c

src/target/arm720t.c

src/target/arm7_9_common.c

src/target/arm7tdmi.c

src/target/arm920t.c

src/target/arm926ejs.c

src/target/arm966e.c

src/target/arm9tdmi.c

src/target/arm_jtag.c

src/target/arm_simulator.c

src/target/armv4_5.c

src/target/embeddedice.c

src/target/embeddedice.h