A 6-year-old girl was gunned down in Texas by a man during an argument over a clogged toilet, police said. Raymeon Means, 35, has been charged with capital murder in the Friday shooting at an apartment complex in Pasadena — where a girl identified in reports by her mother as Laurionne Walker was shot during a dispute over spilled water from the backed-up toilet, police said. “The toilet was stopped up and the water spilled out, so it was overflowing and that was what set him off I guess,” Pasadena police spokeswoman Jessica Ramirez told The Post Monday. Means has been identified as a relative of the girl in some reports, but Ramirez said he’s not related to Laurionne. The girl’s mother and his sister are “really good friends,” close enough that some people mistook them for being family members, Ramirez said.